All 100 actors in both CSI: Crime Scene Investigation and It's Always Sunny in Philadelphia
100 actors have appeared in both CSI: Crime Scene Investigation and It's Always Sunny in Philadelphia, across 524 episodes. The most-credited is Sandy Martin, Female Trucker, Office Manager in CSI: Crime Scene Investigation and Mrs. Mac in It's Always Sunny in Philadelphia.
| Actor | In CSI: Crime Scene Investigation | In It's Always Sunny in Philadelphia | Eps | Eps |
|---|---|---|---|---|
| Sandy Martin | Female Trucker, Office Manager | Mrs. Mac | 2 | 18 |
| Andrew Friedman | Preston Schember | Jack Kelly | 2 | 13 |
| Jimmi Simpson | Thomas Donover | Liam McPoyle | 2 | 9 |
| Travis Schuldt | Aron DeRosa | Ben Smith (The Soldier) | 1 | 7 |
| Nate Mooney | Fingerless Guy, Larry Smite | Ryan McPoyle | 2 | 9 |
| Kyle Davis | Clerk | Lil' Kevin | 1 | 2 |
| Lex Medlin | Sgt Barclay | A.D. | 2 | 1 |
| David Marciano | Frank Samuels | Detective Larson | 1 | 1 |
| Don Swayze | Dave Bohr | Ray | 1 | 1 |
| Erik Jensen | Jeffrey Sinclair | Walter Harris | 7 | 1 |
| Jessica Collins | Missy | Jackie Denardo | 1 | 3 |
| Kari Coleman | Mrs. Sheila Beck | Margie | 1 | 1 |
| Kristoffer Polaha | Darryl Walsh | Male Employee | 1 | 1 |
| Marshall Allman | Jonathan Alaniz | Bezzy | 1 | 1 |
| Peter MacKenzie | Dr. Eisling | Doctor | 2 | 2 |
| Regan Burns | James Billmeyer | Swim Club Manager | 1 | 1 |
| Tuc Watkins | Marcus Remmick | Scott | 1 | 1 |
| Andy Buckley | Jason Hendler, Reporter #1 | Andy | 2 | 1 |
| Brad Carter | Gerald Tolliver, Rudy | Carney | 2 | 1 |
| Jack McGee | Richard O'Malley, Road manager | Detective Lance Girard | 2 | 1 |
| Aaron Paul | Peter Hutchins Jr. | Aaron Paul | 1 | 1 |
| Andrew Leeds | Tom Bell | Jason | 1 | 1 |
| Autumn Reeser | Rachel Lyford | Megan | 1 | 1 |
| Bonnie Burroughs | Dusty | Cop | 1 | 1 |
| Cody Kasch | Tommy Baker | Cheesefoot | 2 | 1 |
| Elizabeth Sung | Cynthia Sato | Female Worker | 1 | 1 |
| Gillian Vigman | Jane Snyder | Karen | 1 | 1 |
| Ian Reed Kesler | Vince Trufant | Tim Murphy | 1 | 2 |
| Jonathan Spencer | Court Clerk | Morgue Worker | 1 | 1 |
| Josh Stamberg | Dr. Tripton | Ari Frenkel | 1 | 1 |
| Lee Weaver | Kerwinkle Lord | Junkyard Owner | 1 | 1 |
| Malea Mitchell | Crystal | Katie | 1 | 1 |
| Maxie J. Santillan Jr. | Homeless Man | Grizzled Busman | 1 | 2 |
| Pat Crawford Brown | Female Dental Patient | Woman - Historical Society | 1 | 1 |
| Robert Pine | Dr. Corey | Jack Mara | 1 | 1 |
| Rosalie Ward | Dede Chase | Sally | 1 | 1 |
| Roxy Wood | Andre Winnyton | Drag Queen | 2 | 1 |
| Sam Witwer | Officer Casella | Muscular Guy | 2 | 1 |
| Shannon McKain | Backseat Passenger | Hitchhiker | 1 | 1 |
| Steve Witting | Peter Walker | Wally Schmidt | 1 | 1 |
| Susan Park | Paige | Woman | 1 | 1 |
| Carter MacIntyre | Taylor Wynard | Male Model, Mike | 1 | 2 |
| Cory Blevins | Surgeon | Benjamin's Dad | 2 | 1 |
| Darris Love | Det. Ezekiel Holstein | Worker | 2 | 1 |
| Jerry Hauck | Mr. Parker | Boss Hogg | 1 | 2 |
| Carla Renata | Devine | Police Clerk | 1 | 1 |
| Christiann Castellanos | Brenda | Carly | 1 | 1 |
| David Ury | Jayson Walt | Spa Worker | 1 | 1 |
| Jeremy Denzlinger | N.D. Uniform #2 | Police Officer | 1 | 1 |
| Jessie Ward | Faith Maroney | Brianna | 1 | 1 |
| Jim Cody Williams | Happy Jack | Owner | 1 | 1 |
| John Rosenfeld | Child Advocate | Morris | 1 | 1 |
| Katie Chonacas | Miss Lucky Dragon | Sara | 1 | 1 |
| Katie Gill | Caroline Fitzgibbons | College Girl #2 | 1 | 1 |
| Natasha Alam | Svetlana Melton | Tatiana | 1 | 1 |
| Peter Asle Holden | Augie Heitz | Union Delegate | 1 | 1 |
| Samantha Shelton | Machine Gun Chick | Charlotte (Female Exec) | 1 | 1 |
| Steven Lee Allen | Security Guard | Fat Guy | 1 | 1 |
| Tricia O'Kelley | Debbie Dunbar | Brenda | 1 | 1 |
| Adam J. Harrington | Ronald Basderic | Gym Manager | 2 | 1 |
| Jeff Kober | Roger Wilder, Walter Douglas Hicks | Creepy Guy | 2 | 1 |
| Reginald VelJohnson | Dr. Philip Kane | Judge Melvoy | 2 | 1 |
| Courtney Gains | Stan Gerber | Roach | 1 | 1 |
| Erin Matthews | Martha Krell | Abey | 1 | 1 |
| Hollie Stenson | Destinee, Melinda Tucker | Woman at Art Show | 2 | 1 |
| Jeff Howard | Young Ken Billings | Southern Dad | 1 | 1 |
| Jeremy Radin | Drunk Driver | Sketchy Nick | 1 | 1 |
| Keir O'Donnell | Ken Richmond | Jan | 1 | 1 |
| Maria Russell | Deena Aquino | Police Officer | 1 | 1 |
| Patrick Thomas O'Brien | Edward Cormier | Associate | 1 | 1 |
| Randy Sklar | Jimmy Hicks | Fat Michael | 1 | 1 |
| Robyn Lively | Joyce Dempsey | Kerry | 1 | 1 |
| Roger Bart | Jeffrey Fitzgerald | Rep | 1 | 1 |
| Roy Jackson | N.D. Officer | Policeman | 1 | 1 |
| Sasha Roiz | Danny Macklin | Adriano Calvanese | 1 | 2 |
| Tom Virtue | Doctor, George | Rink Official | 2 | 1 |
| Zack Ward | Steve Card | Davy Mara | 1 | 1 |
| Bill Chott | Jerry Gable | Gary | 1 | 1 |
| Brady Smith | Tom Layman | Tony | 1 | 1 |
| Harley Graham | Cara Nolan | Young Dee | 1 | 1 |
| Jeremy Ratchford | Tommy Sconzo | Detective | 1 | 1 |
| Paul Bartholomew | Parent | Psychic John | 1 | 1 |
| Randy Thompson | Colonel Isaac Phillips | Bald Man | 1 | 1 |
| Ray Porter | Carl Van Goe | Gerry | 1 | 1 |
| Meredith Giangrande | Susan Hodep | Nancy | 1 | 1 |
| Van Epperson | Judge | Boss | 1 | 1 |
| Will Harris | Daryl Weeks | Security Guard | 1 | 1 |
| William Stanford Davis | Mechanic William | Mr. Johnson | 1 | 1 |
| C.J. Hoff | Pasty Geek | The Kid | 1 | 1 |
| Jason Manuel Olazábal | Louis Delgado | Worker | 1 | 1 |
| Jason Sklar | Dwayne Hicks | DJ Squirrely D | 1 | 1 |
| Kirk Bovill | Dale Durney | Colonel Wahington | 1 | 1 |
| Maury Sterling | Det. Ken Martz | Man | 1 | 1 |
| Ryan Alvarez | Hollywood | Billy | 1 | 1 |
| Aneliese Roettger | Blue Painted Lady | Beautiful Woman | 1 | 1 |
| Jim Ortlieb | Winston Barger | Belka Maier | 1 | 1 |
| Cleo King | Lucy | Nurse Wendy | 1 | 1 |
| Philip Newby | Night Manager | Nebbish Guy | 1 | 1 |
| Gary Anthony Williams | Police Impound Driver | Raisin, Snowman | 1 | 1 |
| Brian Fong | Korean Father | Old Asian Man | 1 | 1 |
← CSI: Crime Scene Investigation × It's Always Sunny in Philadelphia
Cast data from TVmaze, licensed CC BY-SA 4.0.