• Patricia Kalember as Carlene Randall, an art teacher who is being stalked.
• Michael Levin as Leonard Morgan, the Senior VP of Manhattan Telecommunications, which he uses for nefarious ends.
• Jerry Stiller as Brahms, a Company man who helps crack a computer code for his friend Robert, to whom he gave the nick name, "The Equalizer."
• George Hearn as Senator Jim Blanding, a Presidential candidate who has dirty laundry at risk of exposure.
• David Proval as Detective Lt. Goldman, who wants to help Carlene Randall, but cannot until a crime is actually committed.
• Paul Jabara as Scott McCall's music teacher.
• Carrie Kei Heim as Sarah, Carlene Randall's daughter.
• David Labiosa as Cristolides, a rogue Company agent who once trusted McCall.
• Casey Biggs as agent Mason, who chases Cristolides to recover intel. ^[1]

Lauren Tom, Tzi Ma & Jodi Long

• Lauren Tom as Mrs. Tom, a maid whose son Vincent is kidnapped while working for an affluent Chinese-American couple, the Lins.
• Tzi Ma as Mr. Lin, who is unwilling to pay the ransom on Mrs. Tom's son Vincent
• Jodi Long as Mrs. Lin, who seems more interested in preparing for their party than recovering Vincent.
• James Russo as a Police Detective, who tactlessly disparages their chances of recovering Mrs. Tom's child alive.
• Ching Valdes as Tommy Li, an Agency asset from Hong Kong's heroin-smuggling underworld, who Robert McCall's utilized in his previous espionage career.
• Kevin Gray as Dal, a nightclub bartender.
• Karen Akers as Cynthia, the nightclub's so-named Head of Personal Relations.
• Donald Li as Joe Boy, the leader of the "Joe Boys" New York Chinatown gang. ^[38]

M. Leo

• Melissa Leo as Irina Dzershinsky, a Russian ballerina, whose father Felix wants to defect to the West.
• Joe Silver as Felix Dzershinsky, Irena's father and Trade Attaché clerk at the Russian Consulate in NYC, who is trying to defect to the United States. ^[28]
• J. T. Walsh as Sam Griffith, a businessman visiting NYC with his wife Eleanor and teen daughter Eddie.
• Maureen Anderman as Eleanor Griffith, wife of Sam and mother of teen daughter Eddie.
• Adam Ant as Francis DeGraumont, a ruthless villain who uses his henchman, Ramon Scavosa, to abduct and traffick unsuspecting young women.
• Sara Botsford as Angelica, Robert McCall's girlfriend.
• Richard Portnow as a Police Detective Lieutenant in the NYPD. ^{[24] [25] [26]}
• Lori Petty as Brandy, a hooker who provides clues and the definition of "Lock Box" to help recover kidnapped teen, Eddie.
• Daryl Edwards as a Police Officer, who directs the Griffiths to the Desk Sergeant.
• David Alan Grier as a Desk Sergeant at the NYPD precinct where the Griffith's await word of their abducted teen daughter, Eddie.
• Luis Guzmán as an unlicensed Gypsy Cabbie who drives away with the Griffiths' luggage.
• Jeff McCarthy as a Waiter. ^[24]

K. Young

• Karen Young as Officer Sandra Stahl, who, not wanting anything to do with dirty cops, consults her father and The Equalizer.
• Will Patton as Officer Nick Braxton, Sandra Stahl's new NYPD partner, who tries to induct her into his ring of dirty cops.
• Bruce MacVittie as Officer Frank Sergi, a dirty cop who answers to Nick Braxton.
• Esai Morales as Officer Miguel Canterra, a dirty cop who answers to Nick Braxton.
• Michael Higgins as Marvin Stahl, Sandra's father and former NYPD Sergeant who dealt with corrupt officers.
• Reginald VelJohnson as DJ Harmon Hunter, who is being threatened by loan sharks.
• Raynor Scheine as a Bum, who is shot by Braxton to implicate Stahl as an accomplice, thus extorting compliance.
• Miguel Piñero as a Superintendent of a tenement, who calls police regarding an elderly woman who died in her sleep. ^[29]

B. Young

• Burt Young as Louie Ganucci, an injured truck driver, who, without means to provide for his teen son Anthony, gets in trouble stealing contraband from the mafia.
• Lois Smith as Marie, who is endangered by her husband Louie Ganucci's actions.
• Kent Broadhurst as Noble, a contraband smuggler conducting his own racket, outside of mafia control.
• Gary Howard Klar as Purcell, Noble's "muscle" henchman.
• Joseph Wiseman as Eddie Vanessi, a "wise guy" mob boss trying to control everything in his territory, including Noble's racket.
• John Capodice as Father Antonelli, who calls The Equalizer to help parishioner Henrietta Fields.
• Anne Jackson as Henrietta Fields, an eccentric former musical-comedy star, who believes someone is trying to kill her for her "treasure." ^[39]

Barron & Whitford

• Dana Barron as Melinda, a hitch hiker traveling from Toronto to Boston with her boyfriend Jayck, who gets into a truck with a bad group.
• Bradley Whitford as Dillart, the leader of brutal young thugs who terrorize Melinda and Jayck.
• William Youmans as Ray, Dillart's accomplice.
• Perry Lang as Bobby, Dillart's accomplice.
• Ed O'Neill as a Doctor
• Ken Jenkins as Sheriff Stone ^[42]
• Jon De Vries as Michael Rosa, a hit man whose main target is Vezay Holden, and whose secondary target is the woman he once loved, Carla Holden.
• Alberta Watson as Carla Holden, Vezay Holden's wife, and ex-lover of both Robert McCall and Michael Rosa.
• George Morfogen as Vezay Holden, an ambassador of an unnamed European nation.
• Bill Cobbs as Barry, a Company man who runs a bar containing a dead drop, which is used by Rosa to contact McCall.
• Lori Cardille as Sarah Claxton, who observes McCall and is involved with hit man Michael Rosa.
• Dee Hoty as a Hostess at Vezay Holden's diplomatic soirée. ^[30]
• Frank Adonis as a Limo Driver (2 episodes). ^{[30] [27]}

Baranski

• Christine Baranski as Victoria Baines, a successful advertising executive and single mother of her troubled teen son Ronald.
• Adam "Ad-Rock" Horovitz as Ronald, Victoria's teen son, who is mesmerized by Eugene Benton into becoming a drug dealer.
• Mark Soper as Eugene Benton, a "charming, ruthless, psychopath," martial artist drug dealer, who enlists Ronald.
• Richard Frank as 1st Client, to who Victoria Baines brags about her son Ronald.
• Bob Gunton as Jim Cronin, Victoria Baines' boss.
• Jim Dale as Gilbert, Victoria's disinterested ex-husband, to whom McCall and Vanessa must convince to help Ronald.
• J. Smith-Cameron as Vanessa, Gilbert's girlfriend
• Alex Winter as Jeffrey Sims, Ron's friend, who uses too much drugs.
• Billy Wirth as Ralph, a dissatisfied drug buyer.
• Jill Larson as a Single Female at Gilbert's art gallery. ^[40]

Dutton

• Brian Bedford as W. Donald Polk, a defense attorney turned vigilante, after courts fail to convict guilty defendants, leading to more crime.
• Charles Brown as Detective Sergeant Oliver Gant, who confronts McCall after a vigilante kills two thugs.
• Mark Baker as Thug #1, who skates on a murder rap, and immediately commits another crime by robbing an old lady.
• Joe Maruzzo as Thug #2, who is the first thug's accomplice. ^[31] Maruzzo also plays "Head," the new Crips leader (after Andreas died), who terrorizes Doctor Elly Walton for not paying tribute with prescription drugs. ^[41]
• Sylvia Kauders as an Old Lady, robbed by two thugs after dismissal of their murder charges.
• Mark Linn-Baker as Ronnie, who provides McCall brand-new, state-of-the-art, top-of-the-line electronics that traces incoming callers; an early implementation of caller ID.
• Charles S. Dutton as Abmennet, a criminal who uses "bump and run" tactics to rob drivers, such as foreign student Sydney Blake, after faking car/pedestrian accidents.
• Nathan George as Tessor, Abmennet's accomplice, who wants to avenge the death of a third accomplice called D.J., killed by Sydney Blake during a failed "bump and run" attempt.
• Geoff Pierson a Lawyer who advised Sydney Blake after her arrest.
• Meat Loaf as Sugar Fly Simon, an "alleged" dealer of illegal arms.
• Bobby Moresco as a Policeman in the 74th precinct. ^[31]

Baker & Feldshuh

• Blanche Baker as Allison Webster, a desperate housewife seeking more attention from her disinterested husband, Ross.
• Ray Sharkey as Geoffery Dryden, a charming but deranged hit man, who takes advantage of Allison's frustration.
• David Margulies as Macklin who employs Pantero and Dryden.
• Tovah Feldshuh as Samantha Page, Allison's friend who encourages her to seek diversion from marriage.
• Carlos Carrasco as Pantero, who tries to reign in Dryden to fulfill a contract killing. ^[25]
• Lonette McKee as Doctor Elly Walton, an incoming free clinic volunteer, whom the Crips gang terrorizes after she refuses to pay tribute with prescription drugs.

Milian & Williamson

• Tomas Milian as Immanuel Pena (aka Hernando Rodriguez), a Marxist former head of the Cuban Secret Police, who Robert McCall helped to defected to New York City, seeking redemption.
• Fred Williamson as Lt. Mason Warren, Elly Walton's old flame, who helps hold the Crips at bay, and also helps McCall against landlord Guthrie Browne.
• Lester Rawlins as Doctor Timms, who, being weary from gang activity, retires from his practice.
• Rosemary De Angelis as Irma Portman, Timms' nurse, who knows the Crips' routine, and calls McCall to put an end to it.
• Paul Calderón as Rat Heart, a Crips gang member. ^[41]

Converse & Berenson

• Frank Converse as Guthrie Browne, a bank owner and villainous landlord.
• Allen Swift as Monty Wynn, a senior harassed to move by Guthrie to redevelop his tenement property.
• Anne Pitoniak as Lilly, Monty's wife who is also harassed to move by Guthrie's thugs.
• Charles Hallahan as George Cook, who McCall has tasked with keeping the Wynn's safe while he investigates.
• Marisa Berenson as Andrea Browne, Guthrie's estranged and battered wife.
• Jude Ciccolella as Joe, a thug hired by Guthrie to harass tenants.
• Paul Herman as Ben, another thug hired by Guthrie to harass tenants.
• Jean DeBaer as Eileen Arden, who works at Guthrie's bank.
• Helen Hanft as Mrs. Washburn, who with her husband, is also a concerned tenant. ^[27]

McHattie

• Sandy Dennis as Kay Wesley, Robert McCall's ex-wife and mother of their son Scott.
• Barry Primus as Walter Wesley, Kay's new husband.
• Stephen McHattie as Eddie Washburn, a deranged, terminally ill felon seeking revenge on Walter for testifying against him
• James Gammon as Michael Cub, Eddie's parole officer who tries to keep Walter safe from Eddie
• Brad Dourif as Fenn, Eddie's ex-con friend who doesn't want to see Eddie return to prison
• Sylvia Miles as Mother, a singer who runs Mothers piano bar.
• Jasmine Guy as Gloria, a call girl Fenn hires for Eddie. ^[43]

Curtis

• James Murtaugh as Barry Konig, a florist who needs protection from spies using a dead drop.
• Robin Curtis as Ginger Brock, a Company agent who has history with Mickey Kostmayer from a prior mission that resulted in the death of her colleagues, which initially complicates their working relationship.
• James Eckhouse as Steve, the "big fish" dead drop ringleader.
• Robert O'Reilly as Fur Collar Man, who utilizes the dead drops. ^[26]

Davi

• Brian Tarantina as Lenny DeWitt, a skyscraper window washer who believes his boss has tried to kill him and his coworker Pete for forming a union.
• Robert Davi as Michael Riegert, Lenny's and Pete's villainous boss.
• Michael O'Hare as Alex, who is enlisted by McCall to help Jimmy.
• Joe Spinell as a mob boss who pressures Riegert to repay his debts.
• John Michael Bolger as a Bartender. ^[32]

Hart

• Melissa Joan Hart as Laura Moore, a young girl who McCall protects from her abusive, ex-con father, Mike Moore
• Caitlin Clarke as Jesse, Laura's mother.
• Zohra Lampert as Veronica Whitney, who pays for Brian's illegal arms deal.
• Charles Knox Robinson as Brian, who betrayed McCall's friend Angela years ago.
• Robert John Burke as O'Toole, Mike Moore's case worker
• Patricia Richardson as an unnamed Woman, who identifies herself to McCall as Veronica's daughter. ^[37]
• Kim Delaney as Sally Ann Carter, an aspiring actress who was taken in by a flashy but ruthless pimp, Anza Serrato.
• Bobby DiCicco as Anza Serrato, a pimp.
• Gwen Verdon as Kelly Sterling, an older, retired Company operative who helps McCall set a trap for the serial "Orchid" killer.
• Kevin Geeras the Orchid Killer
• Lynn Milgrim as Mrs. Lenox, one of the Orchid Killer's victims
• Joe Lisi as a Patrolman. ^[33]

In "Breakpoint," terrorists kidnap their target but do not escape before police arrive, forcing a hostage situation in the hotel where a large wedding reception is under way. The episode features a large cast of nine guest stars (excluding regular cast), four co-stars, and four supporting actors (plus two uncredited terrorists and numerous extras). ^[44]

Guest stars include Patricia Clarkson as Deborah Wade, who has just married Benjamin Wade. She conspires with McCall as if she knows how her enemies think, and seems quite willing to act when the time is right, even managing to kick one of the terrorist in the face. This is Clarkson's second screen role, before her film debut in The Untouchables (1987). The unnamed terrorist leader is played by Tony Shalhoub in his screen debut, five years before joining the cast of Wings (1991). He plays a cold, calculating, focused ideologue who stops at nothing to secure his prize, Gustav Herant. ^[44]

Aharon Ipalé plays Gustav Herant, a philanthropist, and the only hostage to keep safe until they return to their (unnamed) country to try, convict, and execute him as a traitor. Richard Hamilton plays Otis Hendricks, a saxophonist in the wedding reception band, who just wants it to be over so he can quit this gig. Phyllis Newman plays Gwen Hunter, who is friendly with everyone, including terrorists, despite a deadly situation. ^[44]

Sam Schacht plays Frank Stevens, a City Councilman who wants to fight back. Schacht also played Frank Carter, an FBI Agent, in "Heartstrings." ^[45] Ron Frazier's unnamed character is sent in by law enforcement when a doctor is requested for a terrorist who was shot, but he only makes a show of treating the wounded; he is there to get a weapon to McCall. Frazier also played Coe in "Nocturne" ^[46] and Honeywell in "Always a Lady." ^[47] Ned Eisenberg and Tony Spiridakis guest star as unnamed terrorists. Eisenberg's character tends to distraction, conversing with hostages, whereas Spiridakis is a coarse thug, in particular towards Deborah. ^[44]

Co-stars include: Earl Hindman as Findlay, presumably law enforcement, but neither his rank, nor his agency or department is mentioned. He does know Mickey Kostmayer, and Robert McCall, and their methods. Hindman will appear thrice more in The Equalizer as Detective Lt. Elmer before joining the cast of Home Improvement as Wilson (1991). Dann Florek plays a Lieutenant (surname Ferraro in dialog), and acts as the negotiator. It is Florek's fourth television role (fifth overall) before joining the casts of L.A. Law (1988) and Law & Order (1990). This is Joseph Kell's first screen role as Benjamin Wade, who tries to remain so Deborah may go free. This is Jeff McCarthy's second screen role (both on The Equalizer) as Gary (surname Speer in dialog). McCall convinces him to trade places, so McCall may stay and help, while Gary goes free. ^[44]

Laurie Metcalf guest stars as Theresa whose friend Vicki is killed after running afoul of industrial spies, in "No Conscience." D. W. Moffett plays a womanizer named Mitchell who inadvertently makes himself a target of Vicki's enemies, after she hands him her phone number. Linda Thorson plays an unnamed industrial spy who wants what Vicki stole; what she now believes Mitchell has. Veteran actor Madison Arnold guest stars as Mr. Signorello, a cabbie who McCall helps, after which Signorello agrees to lend a hand when needed. In this episode, he tails Laurie and reports back to McCall. Kelly Curtis co-stars as Laurie's friend Vicki who initially passed the information to Mitchell. Karen Morris Gowdy as Mary, and Nitchie Barrett as Dana, co-star as two of Mitchell's many conquests. Lara Harris as a Blonde on Phone has a small supporting role in which she is mistaken for Vicki. ^[34]

Dan Hedaya guest stars as Frank Donahue, inventor of the Donahue Fuel Injector who claims IP theft, not realizing that his boss at Penatrax has already committed murderous "Unpunished Crimes." Regina Baff plays Susan Donahue, Frank's wife, who has lost patience with Frank's fixation on the success of his invention, and is on the verge of leaving him. Baff will have one more role, which will be her final screen appearance, as Kitty Halsey in The Equalizer series finale, "Suicide Squad." ^[48] John Cameron Mitchell plays Frank's eldest son Ed Donahue, who sides with his mother. It is Mitchell's second screen role. Cameron Johann (as Cameron Charles Johann) plays Frank's son Rick Donahue, who calls The Equalizer to save his father and their family. Johann will have one more Equalizer role as Chris Winter in "Re-Entry." ^[49] After a handful of other screen roles in the 1980s, Johann became a producer. ^[50] John Cullum guest stars as Stuart Cane, the ruthless CEO of Penatrax, who has a dark secret. Co-stars include: Jon Polito as Gianni Greco, who led a terrorist organization called Red Wind. Polito has two more Equalizer roles as Gene Caramack in "Memories of Manon" ^[51] and as David Pfieffer in "Silent Fury;" ^[52] Joseph Ragno as Jock co-stars as McCall's plumber, who makes a mess of it, doesn't finishing it. and still wants money for it; Lee Wallace as Whitney, who works for Cane, but tries protect corporate interests; Clifford David as Charles Webber, George Guidall as Richard Phillips, and Walter Bobbie as George Cox, portray Corporate Executive Officers from other companies, who Greco uses to run a game on Cane to uncover his unpunished crimes; and August Schellenberg as Brennan, who works for Cane. ^[36]

In the season two finale, "Pretenders," Chad Redding guest stars as Beth Mackie, a rookie reporter who is struggling to make a name for herself, and enough money to fight for custody of her six year-old son. Beth suspects her neighbor is a criminal, and smells a story. McCall is dubious. Beth offers more business by crediting him in her exposé on Parker. He takes her case only after matters escalate. Chad Redding made her final^{[ citation needed ]} screen appearance in season four of The Equalizer as NYPD Detective Sgt. Alice Shepard in the 1989 episode "The Caper," ^[53] after ten episodes in the role beginning with season two in "A Place to Stay." ^[54] Tony Musante guest stars as John Parker (an alias), who threatens Beth after she witnesses something nefarious. Other guest stars include: Philip Bosco as Brian Barclay, Beth's editor who doesn't see a story but encourages Beth nevertheless (Bosco also plays Oscar in "Heart of Justice" ^[55] ); and Albert Macklin as Dack, Beth's sympathetic colleague who helps her write about sports, and refers her to The Equalizer. Co-stars include: Bruce Jarchow as Flynn, who once tried to interview The Equalizer, and Beth's co-worker who will give her pointers, starting with dinner; and Katherine Cortez as Cynthia, Beth's friend, and the one who sublet the apartment to Parker. This is Cortez's debut television role, and third screen role overall. Cortez also plays Karen Alden in "Inner View" ^[56] and Cecilia Romero in "Past Imperfect." ^[57] Supporting actors include: David Bailey as 1st Suit, who with the second guy in a suit, abducts Ian Buchanan's character, Harried Man. This is Buchanan's television debut before joining the cast of General Hospital as Duke Lavery a few months later; and singer Grace Garland as Karen, who works at the Company office and tries to access Parker's file for McCall.