All 81 actors in both Castle and Mom
81 actors have appeared in both Castle and Mom, across 343 episodes. The most-credited is Don McManus, Archie "The Savannah Hammer" Bronstein in Castle and Steve Casper in Mom.
| Actor | In Castle | In Mom | Eps | Eps |
|---|---|---|---|---|
| Don McManus | Archie "The Savannah Hammer" Bronstein | Steve Casper | 1 | 10 |
| Amy Hill | Alma | Beverly | 1 | 7 |
| French Stewart | Zach Robinson | Chef Rudy | 1 | 7 |
| Leonard Roberts | Special Agent Jason Avery | Ray | 2 | 4 |
| Victor Webster | Josh Davidson | Dr. Harris | 4 | 1 |
| Wallace Langham | Dr. Van Holtzman | Jerry | 1 | 3 |
| Nicole J. Butler | Cassandra | Woman #1 | 1 | 2 |
| Virginia Montero | Abuela | Marta | 1 | 4 |
| Chris L. McKenna | Simon Westport | Derek | 1 | 1 |
| Christina Moore | Stephanie Frye | Camille | 1 | 1 |
| Jack McGee | Dale Fickas | Frank | 1 | 1 |
| Jim Meskimen | Randolph Addison | Man | 1 | 1 |
| Malcolm Foster Smith | Officer Haskell | Mookie | 1 | 1 |
| Mark Bloom | Neal Morris | Armand | 1 | 1 |
| Stefan Marks | Archibald Fosse | Guy | 1 | 1 |
| Claudia Choi | CSU Photo Technician, Video Technician | Woman | 2 | 1 |
| Jennifer Marsala | Natalie Mendoza | Amber | 1 | 2 |
| Natasha Hall | Madison Beaumont | Shawn | 1 | 2 |
| David Meunier | Sasha | Yuri | 1 | 3 |
| Alimi Ballard | Frank Jackson | Professor Gannon | 1 | 1 |
| Carlease Burke | Storage manager | Nurse Patricia | 1 | 1 |
| Danielle Bisutti | Claire Panchard | Dana | 1 | 1 |
| Jim Holmes | Dr. Ian Fuller | Wayne | 1 | 1 |
| Parisa Fakhri | Colette Roth | Laurie | 1 | 1 |
| Peter Onorati | Sal Malavolta | Wayne | 1 | 1 |
| Rob Brownstein | Captain Ziering | Dr. Mekizian | 1 | 1 |
| Sonya Leslie | Valerie Thompson | Nancy | 1 | 1 |
| Susan Ruttan | Eleanor Pike | Lucy | 1 | 3 |
| Tiffany Dupont | Greta Mastroianni | Alicia | 1 | 1 |
| Tom Virtue | Judge Fitz | Martin | 1 | 1 |
| Bonnie Hellman | Frumpy Nightgown Woman | Barbara | 1 | 1 |
| Brandon Morales | Cop | Tony | 1 | 1 |
| Brett Wagner | Jack Spurloch | Frankie | 1 | 1 |
| David Figlioli | Ralph Marino | Andre | 1 | 1 |
| Jerry O'Donnell | Milton Cicero | Howard | 1 | 1 |
| Jesse Luken | Carter Wexland | Travis | 1 | 1 |
| June Squibb | Jamie Isaacson | Dottie | 1 | 1 |
| Katherine Von Till | Janice Elden | Dixie | 1 | 1 |
| Kevin Daniels | Reggie Blake | Officer Bill | 1 | 1 |
| Mary-Pat Green | Erin Murphy | Susie | 1 | 1 |
| Matt Roth | Philip Dagmar | Jerry | 1 | 1 |
| Michael Dempsey | Frank Malloy | Officer Milliner | 1 | 1 |
| Raymond Ma | Lucky Dragon Owner | Husband | 1 | 1 |
| Robb Derringer | Jeffery Wadlow | Vic | 1 | 1 |
| Rodney J. Hobbs | Worker | Waiter | 1 | 1 |
| Sonya Eddy | Olivia 'Mama' Toussaint | Angela | 1 | 1 |
| Ted McGinley | Brock Harmon | Dr. Berenson | 1 | 1 |
| Tom Amandes | Aaron Stokes | Richard | 1 | 1 |
| Christopher Goodman | man #1 | Waiter | 1 | 1 |
| Daniel Steven Gonzalez | Bronx PD Officer | Swat Officer | 1 | 1 |
| Jim Turner | Janacek Spivey | Rick | 1 | 1 |
| Julie Claire | Lisa Jenkins | Vivian Prescott | 1 | 1 |
| Konstantin Lavysh | Mikhail Dankov | Sergei | 1 | 1 |
| Lilli Birdsell | Samantha Williger | Lydia | 1 | 1 |
| Mark Berry | Captain Bigelow | Douglas | 1 | 1 |
| Mason McCulley | Percy Johnson III | Christopher Peterson | 1 | 1 |
| Monica Garcia | Cleaning Lady | Soledad | 1 | 1 |
| Nathan Anderson | Brent Reeves | Guy | 1 | 1 |
| Patrick O'Connor | Chris Markum | Minister | 1 | 1 |
| Rob Nagle | Kirby Smith | M.C. | 1 | 1 |
| Robert Curtis Brown | Ian Busch | Edward | 1 | 1 |
| Ron Roggé | Wolkowski | Fireman #3 | 1 | 1 |
| Samantha Cutaran | Gym Clerk | Receptionist | 1 | 1 |
| Aris Alvarado | Tito | Al | 1 | 1 |
| Carole Gutierrez | Dr. Deb Lander | Winifred | 1 | 1 |
| Ian Reed Kesler | Hugo Morrison | Lee | 1 | 1 |
| Jack Guzman | Frankie Saldana | Guard | 1 | 1 |
| Josh Latzer | Gary Duffin | Tony | 1 | 1 |
| Juan Alfonso | Delivery Man | Officer Barry | 1 | 1 |
| Michanne Quinney | Trainee | Hostess | 1 | 1 |
| Michelle N. Carter | Woman | Tracy | 1 | 1 |
| Regi Davis | Dr. Bailey | Manager | 1 | 1 |
| David Barrera | Principal Joe Silva | Gary | 1 | 1 |
| Jim Piddock | Lord Henry | Kenneth | 1 | 1 |
| Nicola Lambo | State Court Officer | Customer | 1 | 1 |
| Van Epperson | Postal Clerk | Judge | 1 | 1 |
| Mark Adair-Rios | Mario "Trucho" Mendoza | Dr. Gonzalez | 1 | 1 |
| Grace Rowe | Reporter #1 | Joan | 1 | 1 |
| Seth Coltan | Maintenance Worker | Andrew | 1 | 1 |
| Anthony Ma | Emcee | Ben | 1 | 1 |
| Chris Erric Maddox | Kris | Steve | 1 | 1 |
Cast data from TVmaze, licensed CC BY-SA 4.0.