Recurring
Mitch Silpa as Clayton Berger (season 1; guest season 2–3), a hard-charging deputy district attorney who clashes with Lola
Tony Denison as Vic Callan (season 1; guest seasons 2–3), Mark's father and a small-time bookie who gives Mark a hard time
Paul McCrane as Jonas Laski (seasons 1–2; guest season 3), a conservative judge known as the "Punisher". He dislikes Mark for apparently injuring him during a game of hockey and has since always given Mark a difficult time prosecuting in his courtroom.
Suzanne Cryer as Maggie Palmer (seasons 1–2; guest season 3), an old colleague of Lola's and current deputy district attorney who accuses her of bias towards defendants.
Todd Williams (seasons 1–2) and Christian Keyes (season 3) as Robin Taylor, Lola's husband who works for the FBI.
Joe Williamson as Kevin Harris (season 1; guest season 2), a LAPD detective and romantic interest for Sherri
Peter MacNicol as Albert Campbell (seasons 1–2), a judge who is one of Lola's colleagues
Ryan Michelle Bathe as Rachel Audubon (seasons 1–2; special guest season 3), a rare powerhouse attorney who can handle both civil litigation and criminal law and who has known Lola since they were in Howard University together and has been best friends with Mark since they were in law school together. She goes to Los Angeles to start her own law firm known as Audubon and Associates, later renamed Audubon, Quinn, and Associates in season 3, after she makes Amy Quinn a partner.
Patricia Rae as Abigail Delgado (seasons 1–3), a judge who is one of Lola's colleagues
Nicholas Christopher as David Sanders (seasons 1-3), Judge Benner's former campaign manager
L. Scott Caldwell as Roxy Robinson (seasons 1–2), Lola's mother.
Brent Jennings as Charles Carmichael (seasons 1, 3), Lola's father
Bret Harrison as Ben Benner (season 1), Judge Benner's son and Sara's boyfriend
Rebecca Field as Carol Coleman (season 2; guest seasons 1, 3)
Samantha Marie Ware as Ness Johnson (seasons 2–3), Lola's new law clerk. She later joins Audubon, Quinn, and Associates in season 3.
Shalim Ortiz as Joaquin Luna (season 2)
Ian Anthony Dale as Louis Bravo (seasons 2–3), the Los Angeles County District Attorney
Steven Williams as Tony Carver (season 2; guest seasons 1, 3)
Louis Herthum as Wayne McCarthy (season 2), a corrupt sheriff responsible for encouraging and covering up police misconduct among his deputies. He believes that it is ok for police to bend or break the law for their benefit because of their badge and self sacrifices for the job.
Anne Heche as Corrine Cuthbert (season 2; guest season 3) A police union representative and a defense attorney who represented Deputy Rashel and Sheriff Wayne McCarthy. She adamantly believes that McCarthy was not guilty of any of his crimes, and she repeatedly denies whenever policemen are accused/guilty of misconduct or illegal acts. She and McCarthy seemingly both believe that it is ok for police to bend or break the law for their benefit because of their badge and self sacrifices for the job.
Ashley Jones as Whitney Gessner (season 2)
Nev Scharrel as Nikki Gessner (season 2)
Rick Fox as August Fox (season 2)
Roger Guenveur Smith as Marshall Thomas (season 3), a judge
Ronak Gandhi as Teddy Biswas (season 3)
Sean Blakemore as André Armstrong (season 3)
