All 96 actors in both ER and Heroes
96 actors have appeared in both ER and Heroes, across 409 episodes. The most-credited is Cristine Rose, Mrs. Martinez in ER and Angela Petrelli in Heroes.
| Actor | In ER | In Heroes | Eps | Eps |
|---|---|---|---|---|
| Cristine Rose | Mrs. Martinez | Angela Petrelli | 1 | 19 |
| Željko Ivanek | Bruce Resnick | Emile Danko | 1 | 12 |
| Robert Knepper | Keith Reynolds | Samuel Sullivan | 1 | 7 |
| Ntare Guma Mbaho Mwine | Assistant D.A., Paul Traylor | Usutu | 2 | 10 |
| Michael B. Silver | Dr. Paul Myers | Liam Samuels | 12 | 1 |
| Leonard Roberts | Police Officer | Daniel Lawrence "D.L." Hawkins | 1 | 2 |
| Thomas Dekker | 4 Year Old Boy | Zach | 1 | 11 |
| Nick D'Agosto | Andy | West Rosen | 2 | 9 |
| Ernie Hudson | Colonel James Gallant | Captain Lubbock | 2 | 2 |
| Louise Fletcher | Roberta "Birdie" Chadwick | Dr. Coolidge | 3 | 2 |
| Clea DuVall | Katie Reed | FBI Agent Audrey Hanson | 2 | 7 |
| Alan Blumenfeld | Rob Savage | Maury Parkman | 1 | 6 |
| Dan Byrd | Russ | Luke Campbell | 1 | 3 |
| Dawn-Lyen Gardner | Sandy Rochon | Elizabeth | 1 | 2 |
| Demetrius Grosse | Officer Newkirk | Samedi | 5 | 3 |
| Stana Katic | Blaire Collins | Hana Gitelman | 2 | 2 |
| Colby French | Greg Becton | Hank | 1 | 4 |
| Rolando Molina | Rolando | Motel Clerk | 5 | 1 |
| Swoosie Kurtz | Tina Marie Chambliss | Millie Houston | 1 | 2 |
| Alexa Nikolas | Megan Nesbitt | Angela Shaw - 1961 | 1 | 1 |
| Carlease Burke | Policewoman | Nurse Hammer | 1 | 3 |
| Cory Hardrict | Curtis, Lil 'Toine | Gang Member | 2 | 2 |
| Barry Shabaka Henley | Detective | Det. Bryan Fuller | 1 | 4 |
| Eugene Byrd | James Connor | Campaign Manager | 1 | 4 |
| Andrew Connolly | Brit #1 | Joseph Sullivan | 1 | 2 |
| Ron Perkins | Mr. Elmore | Dr. Livitz | 1 | 4 |
| Bonnie Burroughs | Candy | Female Coroner | 1 | 1 |
| John Prosky | Mr. Brooks | Micah's Principal | 4 | 1 |
| Katherine Boecher | Jenny | Alena | 1 | 1 |
| Shishir Kurup | Pakastani Student | Nirad | 1 | 3 |
| Mark L. Young | Evan Hayes | Jeremy Greer | 1 | 2 |
| Raphael Sbarge | Mr. Kirkendall | Sheriff Werner | 2 | 1 |
| Josh Clark | Officer McCauly | Sheriff Davidson | 1 | 4 |
| Franc Ross | Naughton | Danny Pine | 1 | 3 |
| Stacy Haiduk | Impaled Mom | FBI Agent Elisa Thayer | 1 | 3 |
| Tina Lifford | Evelyn Pratt | Paulette Hawkins | 2 | 1 |
| Brian Tarantina | Joe Barkley | Weasel | 1 | 2 |
| Nicole Bilderback | Claire | Ms. Sakamoto | 1 | 2 |
| Rebecca Tilney | Judy Cochran | Mrs. Crane | 1 | 1 |
| Steve Tom | MacPherson | Steve | 1 | 1 |
| Archie Kao | Yuri | Doctor | 2 | 1 |
| Jeanette Brox | Stacy Miller | Camille | 1 | 2 |
| Amrapali Ambegaokar | Clerk | Annapura | 1 | 1 |
| K Callan | Kelly Robinson | Elderly Charlie | 1 | 1 |
| Ned Schmidtke | Cal | Martin Gray | 1 | 1 |
| Sterling Beaumon | Danny Raskin | Crane Boy | 1 | 1 |
| William Charlton | Man | Cook | 1 | 1 |
| Brad Greenquist | Mr. Butler | Kaito's Assistant | 2 | 1 |
| Jack Wallace | Mr. Reynolds | Arnold | 1 | 2 |
| Paula Newsome | Rehab Receptionist Margaret | Dr. Witherson | 1 | 2 |
| Ray Baker | Durant | Mr. Millbrook | 1 | 2 |
| David Barrera | Felix Hernandez | FBI Agent Casada | 1 | 1 |
| Geno Monteiro | Fred | Petrelli Aide | 1 | 2 |
| Hank Stratton | Curt Oberg | Doug Douglas | 1 | 1 |
| Paul Perri | Monty | Dealer | 1 | 1 |
| Nigel Gibbs | Matson | DC Lieutenant | 1 | 1 |
| Stephen Monroe Taylor | Ulney | Richard | 1 | 1 |
| Jack Guzman | Morgan | Stan | 2 | 1 |
| Karl T. Wright | Dr. Norris | Prinicipal Marks | 1 | 2 |
| Ewan Chung | Chiu | Office Worker #4 | 1 | 1 |
| Louis Iacoviello | Officer Rovner | Detective Jeff Tracy | 2 | 1 |
| Paul Raci | Mr. Spencer | Ernie the Weasel | 1 | 1 |
| Susan Angelo | Mrs. Frum | Woman | 1 | 1 |
| Walter Wong | MRI Tech | Freezing Analyst | 1 | 1 |
| David Pompeii | Man | Tracksuit | 1 | 1 |
| Mercedes Colon | Detective | Police Detective | 1 | 1 |
| Michael Reilly Burke | Dick White | Detective | 1 | 1 |
| Rusty Schwimmer | Grollman | Dale Smither | 1 | 1 |
| Chris Hendrie | Capt. Crawford | Dr. Brooks | 1 | 1 |
| Edward Carnevale | Packie | Dispatcher | 1 | 1 |
| John Lacy | Kevin Poole | Detective | 1 | 1 |
| Mark Harelik | James | Howard Lemay | 1 | 1 |
| Meera Simhan | Mandy | ER Doctor | 1 | 1 |
| Pramode Kumar | Bheru | Grandfather | 1 | 1 |
| Stephen Spinella | Henry Lotery | Oliver Dennison | 1 | 1 |
| Christina Haag | Mrs. Barnes | Dr. Beth Lindall | 1 | 1 |
| Marie Wong | Crystal Hung | Nurse | 1 | 1 |
| Christine Avila | Corazon | Mother Superior | 1 | 1 |
| Ivonne Coll | Grandmother | Nidia | 1 | 1 |
| Julie Pop | Hannah, Mary Gitlitz | Office Worker #3 | 2 | 1 |
| Steve Seagren | Zimmer | Doorman | 1 | 1 |
| Helen Eigenberg | Renee Weber Stewart | Nurse | 1 | 1 |
| Ben Murray | Orest | Rufus | 1 | 1 |
| Greg Wrangler | Construction Worker | Fire Chief | 1 | 1 |
| Jonathan T. Floyd | Student | Officer Landry | 1 | 1 |
| Mary Wickliffe | Evidence Tech | Doctor Puljos | 1 | 1 |
| Kimleigh Smith | Ringwood | African American Woman | 1 | 1 |
| Emerson Brooks | Gonzalez | Police Officer | 1 | 1 |
| John Antonini | Officer Jeff Greenberg | Agent #1 | 1 | 1 |
| John F. Schaffer | Drooling Patient | Audience Member | 1 | 1 |
| Matt Eyde | Agent Lee | Uniformed Cop | 1 | 1 |
| Taira Soo | Jordan | School Teacher | 1 | 1 |
| Jose Rosario | Blue Collar Guy | Sheriff | 1 | 1 |
| Robert Rigamonti | Mr. Adler | Heidi's Surgeon | 1 | 1 |
| Pamela Shaddock | Reporter Winslow | Nurse | 1 | 1 |
| Rene L. Moreno | Ed | Coyote | 1 | 1 |
Cast data from TVmaze, licensed CC BY-SA 4.0.