All 150 actors in both Monk and The Practice
150 actors have appeared in both Monk and The Practice, across 291 episodes. The most-credited is Holland Taylor, Peggy Davenport in Monk and Judge Roberta Kittleson in The Practice.
| Actor | In Monk | In The Practice | Eps | Eps |
|---|---|---|---|---|
| Holland Taylor | Peggy Davenport | Judge Roberta Kittleson | 2 | 29 |
| Mik Scriba | Lt. Bristo | Detective Frank Simons | 1 | 6 |
| Donal Logue | Gully | A.D.A. Dickie Flood | 1 | 5 |
| Teri Polo | Stephanie Briggs | Sarah Barker | 1 | 5 |
| Robert Clendenin | Gerald | David Rogers | 1 | 4 |
| Virginia Madsen | T.K. Jensen | Marsha Ellison | 3 | 2 |
| Eve Gordon | Aunt Madge, Janie | Janet Walsh | 2 | 2 |
| John Hawkes | Matthew Teeger | Stuart Donovan | 1 | 3 |
| Michael Patrick McGill | First Patrolman, Sgt. Steiner, Uniform Cop #2 | Officer Gailey | 3 | 1 |
| Charles Durning | Hank Johansen | Stephen Donnell | 1 | 2 |
| D.B. Woodside | Dr. Matthew Shuler | Aaron Wilton | 2 | 1 |
| John Bellucci | Abernathy | Documentary Interviewer | 1 | 2 |
| Michael Badalucco | Owen McCloskey | Jimmy Berluti | 1 | 2 |
| Billy Gardell | Ian Agnew | Manny Quinn | 1 | 4 |
| Philip Baker Hall | Salvatore Lucarelli | Judge Joseph Vinocour | 1 | 4 |
| Adam Arkin | Dale "the Whale" Biederbeck | Attorney Albert Ginsberg | 1 | 1 |
| Chi McBride | Mayor Ray Nicholson | Principal Steven Harper | 1 | 1 |
| Gary Cole | Dexter Larsen | Defense Attorney Solomon Tager, Attorney Brian Seabury | 1 | 3 |
| Jeffrey Dean Morgan | Steven Leight | Daniel Glenn | 1 | 1 |
| William Atherton | Commander Whitaker | A.D.A. Keith Pratt | 1 | 3 |
| Kathy Baker | Sylvia Fairbourn | Evelyn Mayfield | 1 | 2 |
| Michael Cavanaugh | Bobby Davenport | Primate Center Director Kenneth Patterson | 2 | 1 |
| Paul Ben-Victor | Al Nicoletto | Benny Small | 1 | 2 |
| Silas Weir Mitchell | Drugstore Manager | Anthony Brickman | 1 | 2 |
| Svetlana Efremova | Nurse Ullman | Natasha Vjorka, Rena | 1 | 2 |
| J.C. MacKenzie | Sidney Teal | Dr. Fred Spivak | 1 | 3 |
| Taylor Nichols | Steve Connelly | Father Tom Dugan | 1 | 3 |
| Amy Aquino | Mrs. Bowen, Rhonda | Judge Louise Moreno | 2 | 1 |
| Chet Grissom | Detective #1, Detective Burns, Detective Terry Chasen | Jeremy Forbes | 3 | 1 |
| Christopher Cousins | Lt. Hendrix | Ralph Alt | 1 | 1 |
| David Eigenberg | Tim Hayden | D.A. Harvey Welk | 1 | 3 |
| Dennis Boutsikaris | Dr. Morris Lancaster | U.S. Attorney Greg Mitchell | 1 | 1 |
| Dylan Baker | John Hannigan | Senator Keith Ellison | 1 | 2 |
| Henri Lubatti | French Chef | Wendall Forsley | 1 | 1 |
| Jeremy Roberts | Dewey Alber | Alan Neel | 1 | 3 |
| Jessica Steen | Myra Teal | Brianna Hatfield, Dr. Sarah Ford | 1 | 2 |
| John Carroll Lynch | Kurt Pressman | Dr. Robert Larson | 1 | 1 |
| John Kapelos | Pauly Flores | Officer John Rydell | 1 | 1 |
| Kurt Fuller | Deputy Mayor Dennis Gammil | Attorney David Lawrence | 1 | 1 |
| Marc Vann | Hal Duncan, Miles Franklin | Terry Glazer | 2 | 2 |
| Maurice Compte | Luke Johnston | Manny Guzman | 1 | 1 |
| Rick Hoffman | Agent Colmes | D.A. Harvey Clarke | 1 | 3 |
| Titus Welliver | Daniel Reese | Gordon | 1 | 1 |
| Tom Bower | Bennie Wentworth | John Pierce | 1 | 2 |
| Willie Garson | Leo Navarro | D.A. Frank Shea | 1 | 2 |
| Chad E. Donella | Ricky Babbage | Kevin Peete | 1 | 2 |
| Charles Napier | Sheriff Bates | Judge Abraham Betts | 1 | 2 |
| Christopher Shyer | Carl | Lawrence O'Malley | 1 | 2 |
| Clyde Kusatsu | Judge Rienzo | Judge Stephen Chin | 1 | 2 |
| Graham Beckel | Bill Gibbard | Dr. Joel Helms | 1 | 2 |
| Jack Stehlin | Local Prosecutor | Dr. Wolfman, Halberry | 1 | 2 |
| Larry Brandenburg | Val Birch | Judge Steven Winwood | 1 | 2 |
| Lawrence O'Donnell | Judge Barr, Judge Lawrence Barr | Judge Franklin Brown | 2 | 1 |
| McNally Sagal | Miss Moody | U.S. Attorney Melnick | 1 | 2 |
| Caroline Aaron | Aunt Shelia | Delores Keplar | 1 | 1 |
| David Purdham | Lyle Peck | Attorney Matthew Stone | 1 | 3 |
| David Valcin | Reggie Dennison | Joey Jacobs | 1 | 1 |
| Jack McGee | Sgt. Danny Weaver | Detective Schitt | 1 | 1 |
| Mark Harelik | Mikel Alvanov | Michael Agosta | 1 | 1 |
| Mark Sheppard | Chris Downey | Eddie Wicks | 1 | 1 |
| Stewart Skelton | Alumni #1 | Prosecutor #1 | 1 | 1 |
| William Sanderson | Joshua Skinner | Mr. Simmons | 1 | 1 |
| Madison Mason | Senate Committee Chairman | Attorney Jacob Hurwitz, FDA Doctor Herwitz | 1 | 2 |
| Mary Mara | Teresa Crane | Dr. Jane Lefkowitz | 1 | 2 |
| Jim Jansen | Mayor Steven Rudner | Attorney Richard Hart, Attorney Ryan Hall, Stephen Gould | 1 | 3 |
| Currie Graham | Harold Maloney | Sheldon Modry | 1 | 1 |
| David Doty | O'Dell | Foreman, Judge Robert Bournes | 1 | 2 |
| David Figlioli | Tommy Zimm | Mark Harris | 1 | 1 |
| Ed Begley Jr. | Dr. Malcolm Nash | Dr. Emanuel Foster | 1 | 1 |
| Faran Tahir | Museum Official | Dr. Michael Shields | 1 | 1 |
| Frank Novak | Marv Chastwick | Dick Walsh | 1 | 1 |
| Gregory Alan Williams | Sorenson | ADA Jeffrey Scott | 1 | 1 |
| Hugh Holub | Shift Supervisor | Attorney Harold Caltrow, Prosecutor #2 | 1 | 2 |
| Ken Marino | Lester Highsmith | Kevin Michaels | 1 | 1 |
| Lisa Sheridan | Lizzie Talvo | Karen Evanson | 1 | 1 |
| Lolita Davidovich | Natasia Lovara | Cassie Ray | 1 | 1 |
| Meredith Scott Lynn | Angela Dirks | Myra Glenn | 1 | 1 |
| Michael Fairman | Stanley Greenblatt | Governor's Council Richmond, School Board President Harold Shaw | 1 | 2 |
| Nick Offerman | Jack Whitman | Charles Rossi | 1 | 1 |
| Paul Hayes | Mr. Cooper | Walter Cates | 1 | 1 |
| Rey Gallegos | Eddie Dial | Hector Guzman | 1 | 1 |
| Richard Schiff | Dr. Lawrence Climan | Bob Show | 1 | 1 |
| Vic Chao | Lee | Officer Chen / F.B.I. Agent | 1 | 1 |
| Ivar Brogger | Deputy Commissioner | Kevin Stadler, John Blair | 1 | 3 |
| Jim Lau | Landlord | Dr. Ming Hyang, Paul Ioki | 1 | 2 |
| Denise Dowse | Samantha Austin | Caroline | 1 | 1 |
| Garret Davis | Plain Clothes Detective | Cassell / F.B.I. Agent Donnigan | 1 | 1 |
| Jamie Anne Allman | Jenny Manderville | Michelle Tritter | 1 | 1 |
| Loanne Bishop | Alumni Chairwoman | Christina Wayne | 1 | 1 |
| Lyman Ward | Mr. Carlson | Mr. Hayes | 1 | 1 |
| Marcello Thedford | Extra Large | Randy Jefferson | 1 | 1 |
| Maria del Mar | Monica Waters | A.D.A. Cindy Lichtman | 1 | 1 |
| Peggy Miley | Mrs. Willis | Martha McKee | 1 | 1 |
| Skip O'Brien | Sgt. Chitwood | Correction Officer Saunders | 1 | 1 |
| Darlene Kardon | Elderly Zemenian Woman, Sweet Old Lady | Mildred the Psychologist | 2 | 1 |
| Dougald Park | Police Spokesman | Zachary Kingman | 1 | 2 |
| Julie Ariola | Sarah McNally | Lorraine Marks | 1 | 2 |
| Karl T. Wright | Monk's Lawyer, Principal Thicket | Andrew Burton | 2 | 1 |
| Alan Wilder | Harold Gumbal | Dr. Gerry Pyle, Walter Rowland | 1 | 2 |
| Anne Gee Byrd | Mrs. Kennedy | Cheryl Mosher | 1 | 1 |
| Dana Ivey | Mrs. Eels | Judge Natalie Brown | 1 | 1 |
| Harve Presnell | Zach Ellinghouse | Judge Dickem | 1 | 1 |
| Marcelo Tubert | Hector | Darryl Stanton | 1 | 1 |
| Mary Chris Wall | Home Shopping Salesperson | A.D.A. Lisa Holtan | 1 | 1 |
| Sharon Johnston | Clara, Hotel Manager | Katie | 2 | 1 |
| Susan Merson | Mrs. Sheckman | Mrs. Green | 1 | 1 |
| Andy Mackenzie | Drug Dealer | Ritchie Macklin | 1 | 1 |
| Angela Hughes | Nurse Brady | Tamara Bagnell | 1 | 1 |
| Bonita Friedericy | Housewife Juror | Sandra Poole | 1 | 1 |
| John Berg | Guest Alfred | Dr. Joshua Illitch | 1 | 1 |
| John Cothran, Jr. | Warden Christie | Chris Patterson | 1 | 1 |
| John Maynard | Repairman | Foreman | 1 | 1 |
| Michael Dempsey | Detective Patterson | Officer Stroud | 1 | 1 |
| Paul Lieber | Medical Examiner | District Attorney | 1 | 1 |
| Ruth Williamson | Doris | Dr. Sharon Gabler | 1 | 1 |
| Sam Vance | Uniform Cop | Officer Hunt | 1 | 1 |
| Sara Van Horn | Night Nurse | Aunt Laurie | 1 | 1 |
| Weston Blakesley | Sgt. Mueller | Washington | 1 | 1 |
| Billy Mayo | Mechanic | Sgt. George Gilman | 1 | 1 |
| Cheryl Hawker | Nurse | Marsha Belson | 1 | 1 |
| John Capodice | Frankie Marino | Joe Jacobs | 1 | 1 |
| Lucinda Jenney | Zena Davis | Angela Jamison | 1 | 1 |
| Nicole DeHuff | Vicki Salinas | Michelle Farrell | 1 | 1 |
| Adam Clark | Cabbie | Officer Michael Clarke | 1 | 1 |
| Anne DeSalvo | Auctioneer | Sylvie Adelstein | 1 | 1 |
| Carl Ciarfalio | First Goon | Officer #3 | 1 | 1 |
| Jan Munroe | Dr. Whitcomb | Dr. Charles Emory | 1 | 1 |
| John O'Brien | Maitre'd | Foreman | 1 | 1 |
| Lennie Loftin | John Delancy | Guard with Randy's Last Meal | 1 | 1 |
| Maurice Godin | Pierre Lecoste | John Aikman | 1 | 1 |
| Milda Dacys | Juliette | Clerk | 1 | 1 |
| Anne Betancourt | Maria Ortiz | Pilar Guzman | 1 | 1 |
| Jack Kehler | Harvey Disher | Kyle Peabody | 1 | 1 |
| Lorin Shapiro | Coat Check Girl | Kingston's Woman | 1 | 1 |
| Marcia Moran | Court Stenographer | Foreperson | 1 | 1 |
| Matt Gottlieb | Photo Booth Clerk | Judge | 1 | 1 |
| Nick Toth | Hospital Administrator | Judge Wayne Morris | 1 | 1 |
| Pamela Shaddock | Waitress | Juror Melanie Sills | 1 | 1 |
| Troy Cephers | SWAT Team | Security Guard | 1 | 1 |
| Albert Owens | Senator | Atty. Jack Roberts | 1 | 1 |
| David Ackert | Patel | Officer Randy Schmidt | 1 | 1 |
| Kevin Quigley | Dr. Leven | Brad Sholey | 1 | 1 |
| Susan Chuang | Kathleen | Reporter No. 2 | 1 | 1 |
| Aaron Lustig | Prosecutor Fox | Attorney Michael King | 1 | 1 |
| Betty Murphy | 2nd Elderly Woman | Connie Malzone | 1 | 1 |
| Kathleen M. Darcy | Mrs. Esterbrook | Clerk No. 2 | 1 | 1 |
| Kevin Dunigan | Guard | Security Guard | 1 | 1 |
| Traber Burns | Minister | Prospective Male Juror #2 | 1 | 1 |
| Lydia Blanco | Maria Fuentes | Court Clerk | 1 | 1 |
| Clement E. Blake | Building Supervisor | Homeless Man | 1 | 1 |
Cast data from TVmaze, licensed CC BY-SA 4.0.