All 66 actors in both Chuck and ER
66 actors have appeared in both Chuck and ER, across 422 episodes. The most-credited is Lyn Alicia Henderson, Large Mart Associate in Chuck and Paramedic Pamela Olbes in ER.
| Actor | In Chuck | In ER | Eps | Eps |
|---|---|---|---|---|
| Lyn Alicia Henderson | Large Mart Associate | Paramedic Pamela Olbes | 1 | 149 |
| Tony Hale | Emmett Milbarge | Norman Chapman | 13 | 2 |
| Julia Ling | Anna Melinda Wu | Med Student Mae Lee Park, Michelle | 8 | 5 |
| Armand Assante | Premier Alejandro Goya | Richard Elliot | 2 | 4 |
| Clare Carey | Kathleen McHugh | Shauna | 4 | 1 |
| Swoosie Kurtz | Laura Turner | Tina Marie Chambliss | 1 | 1 |
| François Chau | Guillermo Chan | Neuro Resident | 1 | 2 |
| Iqbal Theba | Peyman Alahi | Dr. Zogoiby | 1 | 4 |
| Jack Yang | Jason Wang | Bevan Wong | 1 | 1 |
| Carl Lumbly | Ty Bennett | Dr. Graham Baker | 1 | 2 |
| Jack Guzman | Drugged Interpol Agent #1 | Morgan | 1 | 2 |
| Jon Sklaroff | Dragan Pichushkin | Bible Guy, Eddie Hainey | 1 | 2 |
| Mark Pellegrino | Alexander Winterborne | Nathan Conley | 2 | 1 |
| Andrew Connolly | Jack Artman | Brit #1 | 1 | 1 |
| Bob McCracken | Julius Burrow | Ring | 1 | 1 |
| Carlos Lacamara | Juan Diego Arnaldo | Ron Kennedy | 1 | 1 |
| Christian Svensson | Frank / Yuri | Sheriff Pohler | 1 | 1 |
| Clyde Kusatsu | Mr. Morimoto | Review Board Doctor #1 | 1 | 1 |
| Henri Lubatti | Nikos Vasillis | Victor | 1 | 1 |
| Omar J. Dorsey | St. Germaine | Gildon | 1 | 1 |
| Patrick Kilpatrick | Leader | Matthew Lindermulder | 1 | 1 |
| Robert Picardo | Dr. Howard Busgang | Abraham Zimble | 1 | 1 |
| Shaun Toub | Dr. Mohammed Zamir | Butler | 1 | 1 |
| Bjørn Johnson | Mats Zorn | Mark Taylor | 1 | 1 |
| Christopher Cousins | Bill Bergey | Kyle Kolber | 1 | 1 |
| Danny Pudi | Vali Chandrasekaren | Mahir Kardatay | 1 | 1 |
| Jim Piddock | Museum Curator | Dr. Earl Whitehead | 1 | 1 |
| Marco Rodríguez | Rocky Falcone | Agent Serena | 1 | 1 |
| Michael Wiseman | Lon Kirk | Danny (Enforcer) | 1 | 1 |
| Tom Choi | Skinny Guard | Zafares | 1 | 1 |
| Tom Kiesche | Julius | Officer Monroe | 1 | 1 |
| Vincent Duvall | Duncan | Father | 1 | 1 |
| William Abadie | Guy LaFleur | David | 1 | 1 |
| Dominic Comperatore | Translator | Vito | 1 | 1 |
| Eric Lange | Colin Davis | Rod Stillman | 1 | 1 |
| Ian Patrick Williams | Mustache Man | Supervisor | 1 | 1 |
| James Francis Ginty | Lewis | Frick | 1 | 1 |
| James Kiriyama-Lem | Ambassador Mei Sheng | Dr. Mitsuma | 1 | 1 |
| John Kapelos | Yari Demetrios | Mr. Irby | 1 | 1 |
| Karen Huie | Old Thai Woman | Mrs. Cheung | 1 | 1 |
| Kevin Weisman | Reardon Paine | Glenn Krakowski | 1 | 1 |
| Mary Pat Gleason | Morgue Technician | Anne Parks | 1 | 1 |
| Peter Onorati | Wally Roberts | Officer Nick Napolitano | 1 | 1 |
| Tia Texada | Hortencia Goya | Gloria Lopez | 1 | 1 |
| Toshi Toda | Thai Bossman | Japanese Businessman 1 | 1 | 1 |
| Derek Mears | Lance | Mugger | 1 | 2 |
| Ken Davitian | "Uncle" Bernie Ominsky | Zakar Papazian | 1 | 2 |
| Emy Coligado | Poppy Tang | Student #6 | 1 | 1 |
| Ewan Chung | Lee Cho | Chiu | 1 | 1 |
| Jeffrey Hutchinson | Auctioneer | Richard Weingarten | 1 | 1 |
| Martin Yu | Engineer #2 | Jimmy | 1 | 1 |
| Michael Hagiwara | Therapist | Steve Sakabu | 1 | 1 |
| Judith Benezra | Linda | Pavelich | 1 | 1 |
| Pablo Espinosa | Javier Diaz | Driver John | 1 | 1 |
| Phil Abrams | Stanford Librarian | Rodney | 1 | 1 |
| Kevin West | Lewis "Merlin" Charles | Robert Sanders | 1 | 1 |
| Ondrej Habinak | Russian | Mirko | 1 | 1 |
| Yolanda Snowball | Justice of the Peace | Neighbor | 1 | 1 |
| Ping Wu | Mr. Wu | Mr. Cheung | 1 | 1 |
| Sanjay Chandani | Mason Whitney | Achir Rizvi | 1 | 1 |
| George Ketsios | Paulie | Bachelor #4 | 1 | 1 |
| Darlene Kardon | Sweet Old Lady | Elderly Woman | 1 | 1 |
| Shawn Huang | Kid | Kevin | 1 | 1 |
| Bruno Amato | Security Agent | Sheriff | 1 | 1 |
| Diana Gitelman | Young Woman #2 | Ticket Agent | 1 | 1 |
| Odessa Rae | Young Woman #3 | Sally Patrice | 1 | 1 |
Cast data from TVmaze, licensed CC BY-SA 4.0.