All 86 actors in both Star Trek: The Next Generation and The Practice
86 actors have appeared in both Star Trek: The Next Generation and The Practice, across 345 episodes. The most-credited is Richard McGonagle, Dr. J'Dar in Star Trek: The Next Generation and Judge Patrick Wilcox in The Practice.
| Actor | In Star Trek: The Next Generation | In The Practice | Eps | Eps |
|---|---|---|---|---|
| Richard McGonagle | Dr. J'Dar | Judge Patrick Wilcox | 1 | 16 |
| John de Lancie | Q | Dr. Walsh, Walter Bannish | 10 | 2 |
| Natalija Nogulich | Admiral Alynna Nechayev | Judge Stevens | 4 | 4 |
| Charles Cooper | K'mpec | Judge Robert Boucher | 2 | 5 |
| Albert Hall | Galek Dar | Judge Seymore Walsh | 1 | 5 |
| Armin Shimerman | Betazoid Gift Box, DaiMon Bractor, Letek | Judge Garth Moskin | 4 | 2 |
| Clyde Kusatsu | Admiral Nakamura | Judge Stephen Chin | 4 | 2 |
| Norman Lloyd | Professor Galen | Rabbi D.A. Asher Silverman | 1 | 4 |
| Thomas Kopache | Engineer, Mirok | Dr. Harold Manning, Judge Morris Seymour, Mr. Schramm | 2 | 3 |
| Carolyn McCormick | Minuet | Dr. Katherine Nesbit, Nancy Healy | 2 | 2 |
| Michael Bofshever | Male Alien | Joshua Berry, Walter Crewson | 1 | 3 |
| Rickey D'Shon Collins | Eric Burton, Boy | Steven Miller | 3 | 1 |
| Ben Slack | K'Tal | Judge M. Fuller | 1 | 5 |
| Michael Rothhaar | Garvin | Judge Laurence Abrahams, Leonard Welish | 1 | 2 |
| Saul Rubinek | Kivas Fajo | Attorney Arnold Hunter | 1 | 2 |
| Spencer Garrett | Simon Tarses | A.D.A. Carter | 1 | 2 |
| Daniel Davis | Professor Moriarty | Judge Barton Wolfe | 2 | 3 |
| Megan Cole | Noor | Meredith Pearson | 1 | 4 |
| Caroline Kava | Dr. Toby Russell | Mary Donovan | 1 | 3 |
| Cristine Rose | Gi'ral | Bernice White | 2 | 2 |
| Ellen Bry | Dr. Farallon | Mary Boyd | 1 | 1 |
| Mark L. Taylor | Haritath | Dr. Reichal, Judge Andrew MacDonald, Wiggins' Psychiatrist | 1 | 3 |
| Richard Cox | Kyril Finn | Attorney Stuart Miller | 1 | 1 |
| Ronny Cox | Captain Jellico | D.A. Scott Colby | 2 | 2 |
| Dey Young | Hannah Bates | Elena Wharton | 1 | 2 |
| Harley Venton | Collins, Hutchinson | Mike Randall | 2 | 1 |
| Billy Campbell | Captain Thadiun Okona | Tom Bartos | 1 | 1 |
| David Sage | Tarmin | Judge Robert M. Breech | 1 | 1 |
| David Selburg | Dr. Syrus, Whalen | Judge K. Holmes | 2 | 2 |
| Earl Boen | Nagilum | Dr. Broadman | 1 | 1 |
| Ellen Geer | Dr. Kila Marr | Judge G. Warner | 1 | 1 |
| George Coe | Avel Durken | Judge Harold Waters | 1 | 1 |
| Lawrence Dobkin | Ambassador Kell | Judge M. Gersh | 1 | 1 |
| Mark Margolis | Dr. Nel Apgar | Richard D'Ambrosio | 1 | 1 |
| Paul Eiding | Loquel | Mr. Liston | 1 | 1 |
| Penny Johnson Jerald | Dobara | Attorney Laura Garrett | 1 | 1 |
| Richard Riehle | Batai | Mr. Holt | 1 | 1 |
| Robin Gammell | Mauric | Judge Michael Small | 1 | 1 |
| Rudolph Willrich | Reittan Grax | Warden Stephen Marshall | 1 | 2 |
| Stefan Gierasch | Dr. Hal Moseley | Judge Brudister | 1 | 1 |
| Steve Rankin | Centurion Patahk | Stephen Jamison | 1 | 3 |
| Tzi Ma | Biomolecular Physiologist | Tang Jingyu | 1 | 1 |
| Vyto Ruginis | Chief Engineer Logan | Jason Swoboda | 1 | 1 |
| Bruce French | Sabin Genestra | Attorney Barry Pederson, Attorney General Walgren, Judge M. Walters | 1 | 3 |
| James Greene | Dr. Barron | Emerson Ray | 1 | 3 |
| Alan Oppenheimer | Koroth | Dr. Richard Papp, Judge Nelson | 1 | 2 |
| Christopher Michael | Coalition Lieutenant | FBI Agent Gus Lewis, Police Officer | 1 | 2 |
| Randy Oglesby | Scholar | Dr. Feldman, Judge Kelly White | 1 | 2 |
| Tim Lounibos | Lt. Kwan | Dr. Michael Wang | 1 | 2 |
| Barbara Tarbuck | Governor Leka Trion | Judge Emily Strong | 1 | 1 |
| Callan White | Krite | Melanie Tucker | 1 | 1 |
| David Huddleston | Conductor | Judge Richard Bender | 1 | 1 |
| John P. Connolly | Lote | Warden Steve Langston | 1 | 1 |
| Kim Hamilton | Chairman Songi | Supreme Court Justice | 1 | 1 |
| Marcelo Tubert | Jared | Darryl Stanton | 1 | 1 |
| Michael Cavanaugh | Captain Robert DeSoto | Primate Center Director Kenneth Patterson | 1 | 1 |
| Michael Reilly Burke | Goval | Detective Kevin McCarley | 1 | 3 |
| Mickey Cottrell | Alrik | Dr. Michael Helms | 1 | 1 |
| Mitchell Ryan | Kyle Riker | Judge George Nelson | 1 | 1 |
| Steven Anderson | Dr. Nilrem | Dr. Emerick, Dr. Barry Jacob | 1 | 3 |
| Ann Gillespie | Ensign Hildebrant | Nina Roenisch | 1 | 1 |
| David L. Crowley | Workman | Police Officer Lawrence Kale | 1 | 1 |
| Earl Billings | Admiral Thomas Henry | Judge Thomas Lawrence | 1 | 1 |
| Eve Brenner | Inad | Sybil Walters | 1 | 1 |
| George D. Wallace | Admiral Simons | Judge Andrew Wood | 1 | 2 |
| John Cothran, Jr. | Captain Nu'Daq | Chris Patterson | 1 | 1 |
| Karen Landry | Ajur | Cindy McGuire | 1 | 1 |
| Nan Martin | Victoria Miller | Judge Lydia Winchell | 1 | 1 |
| Page Leong | Ensign April Anaya | Pauline | 1 | 1 |
| Scott MacDonald | N'Vek | Detective Disaia | 1 | 1 |
| Stephen Markle | Kova Tholl | Forensic Pathologist | 1 | 1 |
| Ben Lemon | Jev | Dr. Richard Eigher | 1 | 1 |
| David Ogden Stiers | Dr. Timicin | Judge E. Hollings | 1 | 1 |
| James Lashly | Ensign Kopf | Joseph Butlington | 1 | 1 |
| Rick Scarry | Jarth | Mr. Connell | 1 | 1 |
| Dierk Torsek | Dr. Bernard | Walter Simon | 1 | 1 |
| Ken Meseroll | Ensign McDowell | Attorney Jonathan Lambert | 1 | 1 |
| Richard Gilbert-Hill | Bosus | Allan Gamm | 1 | 1 |
| Dennis Creaghan | Louis | Judge J. Kramer | 1 | 1 |
| Mike Genovese | Desk Sergeant | Officer Carl Smitko | 1 | 1 |
| Timothy Carhart | Lt. Cmdr. Christopher Hobson | Officer Paul Brewer | 1 | 1 |
| Basil Wallace | Kling Guard #1 | A.D.A. Jerry | 1 | 1 |
| Wren T. Brown | Transporter Pilot | Attorney Scott Layden | 1 | 1 |
| Jordan Lund | Kulge | Police Officer | 1 | 1 |
| Karen Hensel | Admiral Brackett | Juanita Marshall | 1 | 1 |
| Mimi Cozzens | Soup Woman | Ellen Rapson | 1 | 1 |
← Star Trek: The Next Generation × The Practice
Cast data from TVmaze, licensed CC BY-SA 4.0.