All 90 actors in both ER and Perception
90 actors have appeared in both ER and Perception, across 370 episodes. The most-credited is CCH Pounder, Dr. Angela Hicks in ER and FBI Psychiatrist in Perception.
| Actor | In ER | In Perception | Eps | Eps |
|---|---|---|---|---|
| CCH Pounder | Dr. Angela Hicks | FBI Psychiatrist | 24 | 1 |
| Jonathan Scarfe | Chase Carter | Special Agent Roger Probert | 8 | 6 |
| Dan Lauria | Rick Simpson | Joe Moretti | 1 | 5 |
| Matthew Glave | Dr. Dale Edson | Senator Scott Ryland | 15 | 2 |
| Gil McKinney | Dr. Paul Grady | Bryan Murphy | 23 | 2 |
| Michael Patrick McGill | Detective Ed Bernstein, Security #1, Officer Jeffries | Dave Richards | 6 | 1 |
| John Rubinstein | Dr. Kenner | Jack Crawford | 1 | 3 |
| Michael B. Silver | Dr. Paul Myers | Lawrence Crawford | 12 | 1 |
| Jo Anderson | Mrs. Cunningham | Wendy Pierce | 1 | 2 |
| Julie Ann Emery | Paramedic Niki Lumley | Susan Vetter | 6 | 1 |
| Frederick Koehler | Benjamin Coe | George aka The Ghost | 1 | 1 |
| Nancy Youngblut | Sarah Howe | Judge Leslie Markway | 1 | 2 |
| Raphael Sbarge | Mr. Kirkendall | Jerry Brockner | 2 | 1 |
| Steven Culp | Dave Spencer, Dr. Charles Cameron | John F. Kennedy | 5 | 1 |
| Trevor Morgan | Scott Anspaugh | Jimmy Miles | 5 | 1 |
| Tzi Ma | Mr. Yeung | Prof. Arthur Wei | 1 | 1 |
| Hedy Burress | Joanie Moore | Ellen Resnick | 4 | 1 |
| Conor O'Farrell | Richard Abbott | David Trent | 2 | 1 |
| Armin Shimerman | Levine | Dr. Cutler | 1 | 1 |
| Bonnie Burroughs | Candy | Mrs. Grant | 1 | 1 |
| Freddy Rodriguez | Simon | Wesley Sumter | 1 | 2 |
| Katherine Boecher | Jenny | Olena Marchenko Prentice | 1 | 1 |
| Nicole Bilderback | Claire | Carol Lao | 1 | 1 |
| Ntare Guma Mbaho Mwine | Assistant D.A., Paul Traylor | ASAC Matthew Jefferies | 2 | 1 |
| Patrick Cassidy | Dr. Ramsey | Kenny Strand | 2 | 1 |
| Peter Jacobson | Susan's molester | Dr. Poole | 1 | 1 |
| Tom Virtue | Pares | Doctor | 1 | 1 |
| Alexis Cruz | Terry | Joseph Garcia | 1 | 1 |
| Brent Briscoe | Eli Ebee | Nightcrawler | 1 | 1 |
| Clare Carey | Shauna | Victoria Pavel | 1 | 1 |
| Isabella Hofmann | AIDS Clinic Doctor | Janice Bosworth | 1 | 1 |
| Jeannetta Arnette | Mrs. Hawkes | Stephanie Nordhoff | 1 | 1 |
| Maggie Wheeler | Amy Kellerman | Barbara Bruckner | 1 | 1 |
| Will Rothhaar | Robert "Bo" Borsalino | Eddie | 1 | 1 |
| Anthony Starke | Dr. Craig | Richard Douglas | 2 | 1 |
| Marty Ryan | Brant | O'Hare Attorney | 2 | 1 |
| Amanda Carlin | Librarian | Lucy's Mother | 1 | 1 |
| Brian McNamara | Gil Brenner | Detective Gerald Rix | 1 | 1 |
| Evan Jones | Todd | Billy Flynn | 1 | 1 |
| Lisa Waltz | Mrs. Wimbur | Sandy Shelby | 1 | 1 |
| Mark Harelik | James | Dr. Chandler | 1 | 1 |
| Nicki Micheaux | Mrs. Williams | Ellen Jameson | 1 | 1 |
| Robert Picardo | Abraham Zimble | A. Z. Weyland | 1 | 1 |
| Dee Freeman | Dr. Lutz | Social Worker | 2 | 1 |
| Robert Maffia | Perfusionist | Detective McKearney | 2 | 1 |
| Bonnie Root | Lori | FBI Agent Nina Curtis | 1 | 1 |
| Holly Gagnier | Tracy Young | Angie | 1 | 1 |
| Michael Dempsey | Mr. Beckwith | Gus | 1 | 1 |
| Molly Hagan | Meredith Smart | Professor Allison Emmett | 1 | 1 |
| Thom Barry | T-Ball | Special Agent William Parsons | 1 | 1 |
| Sandy Martin | Mrs. Zarian, Sister Helen | Shirley | 2 | 1 |
| Dave Shalansky | Mr. Saltzman | Kurt Simpson | 1 | 1 |
| David Purdham | Dr. Kallis | Walter Bosworth | 1 | 1 |
| Fred Saldone | Stetson | Cop | 1 | 1 |
| Ingo Neuhaus | Cop, McNally | Prison Guard | 2 | 1 |
| Marina Benedict | Lois Landry | Zoey | 1 | 1 |
| Robert Blanche | Detective Milne | Dan Bukowski | 1 | 1 |
| Wendy Phillips | Mrs. Lambright | Eileen Miles | 1 | 1 |
| Allison Smith | Denny | Laura Crane | 1 | 1 |
| Annie Abbott | Mrs. Torledsky | Alex's Landlady | 1 | 1 |
| Chad E. Donella | Kevin Delaney | Ted Duxbury | 1 | 1 |
| Jonathan Slavin | Ron | Kevin | 1 | 1 |
| Paul Cassell | Ed Gamble | Dr. Landon Jennings, L-DUB | 1 | 1 |
| Stacy Barnhisel | Nancy | Female Shopper | 1 | 1 |
| Wolfgang Bodison | Al Boulet | Chris Leavins | 1 | 1 |
| Jack Forbes | Police Officer | Officer Randolph | 1 | 1 |
| Jude Ciccolella | Roach Coach Charlie | Imaginary Detective | 1 | 1 |
| Pat Millicano | Mr. Hahn | Eddie Russell | 1 | 1 |
| Philip Casnoff | Dr. Dan Litvak | Gordon Williams | 1 | 1 |
| Richard Edson | Vinnie La Fontaine | Keith Trevoy | 1 | 1 |
| Robert Bagnell | Paxton | Ron Norton | 1 | 1 |
| Scott Paulin | Dr. Kirsch | Senator Ted Paulson | 1 | 1 |
| Teddy Vincent | Vivian Nickelby | Donny's Grandmother | 1 | 1 |
| August Emerson | Jett | Justin Reycraft | 1 | 1 |
| Courtney Gains | Ronnie | Officer James McKenzie | 1 | 1 |
| James Hornbeck | Dr. David Zaccarria | Russ Anderson | 1 | 1 |
| Pat Skipper | Carl Dayton | Sheriff Ronnie | 1 | 1 |
| Paul Ambrus | Pendleton | Detective | 1 | 1 |
| Rakefet Abergel | Cindy Holmes | Fangirl | 1 | 1 |
| Cheyenne Wilbur | Garrity | Professor Schneider | 1 | 1 |
| J.R. Cacia | Ogilvie | Thomas Akers | 1 | 1 |
| Walter Addison | Mr. Kane | Judge | 1 | 1 |
| Dylan Kenin | Louie | Man | 1 | 1 |
| Klea Scott | Joanne | CPD Detective | 1 | 1 |
| Lou George | Driver | Kevin Reynolds | 1 | 1 |
| Bambadjan Bamba | Psychotic | Anthony | 1 | 1 |
| David Stifel | Boz | Worker | 1 | 1 |
| Kevin Weisman | Glenn Krakowski | Todd Erlich | 1 | 1 |
| Cameron Dye | Damian's Dad | Attorney Larsen | 1 | 1 |
| Miguel Pérez | Santiago Escalona | Judge James Cabrera | 1 | 1 |
Cast data from TVmaze, licensed CC BY-SA 4.0.