| Thomas Middleditch | Richard Hendricks |
| Josh Brener | Nelson 'Big Head' Bighetti |
| Martin Starr | Bertram Gilfoyle |
| Kumail Nanjiani | Dinesh Chugtai |
| Amanda Crew | Monica Hall |
| Zach Woods | Donald 'Jared' Dunn |
| Matt Ross | Gavin Belson |
| Suzanne Cryer | Laurie Bream |
| Jimmy O. Yang | Jian Yang |
| Chris Diamantopoulos | Russ Hanneman |
| Alec Berg | Documentarian |
| Emily Chang | Emily Chang |
| Dick Costolo | Dick Costolo |
| Jim Cramer | Jim Cramer |
| Ben Feldman | Ron LaFlamme |
| Craig Frank | Michael Eisenberg |
| Bill Gates | Bill Gates |
| Andre Iguodala | Andre Iguodala |
| Conan O'Brien | Conan O'Brien |
| Joel Swetow | Rod Morgenstern |
| Kara Swisher | Kara Swisher |
| Cinda Adams | Pied Piper Employee #2 |
| Carmen Angelica | Screaming Woman |
| Chris Aquilino | Danny |
| Aristotle Athari | Gabe
(as Aristotle Athiras) |
| Jaidyn-Bleau | Girl in Pied Piper Ad |
| Julianne Buescher | Debbie |
| James Calixte | Young Man in Queue |
| Rick Chambers | KCYD News Anchor |
| John Colton | Lawrence Smith |
| Samantha Cutaran | Pied Piper Employee |
| Mariel Martinez | Employee #6
(as Mariel de la Mora) |
| Judith Drake | Judy |
| Julia Finkelstein | Stanford Student |
| Rosie Garcia | Coordinator |
| Sophia Grosso | Young Woman in Queue |
| Drake Hansen | Boy in Pied Piper Ad |
| Sumar Henderson | |
| Jay Jackson | KTUY3 Male News Anchor |
| Davey Johnson | Stage Manager |
| Yonas Kibreab | Boy in the Jungle |
| Robert M. Lee | Pied Piper Employee |
| Krissy Lu | Pied Piper Employee #1 |
| Toyin Moses | Pied Piper Employee #8 |
| Henry Phillips | John Stafford |
| Lavelle Roby | Woman in Pied Piper Ad |
| Rachel Rosenbloom | Becky |
| Jason Sims-Prewitt | Jim Gittman |
| Krishna Smitha | Priyanka Singh |
| Leanne Suter | KTUY3 Female News Anchor |
| Alfred Rubin Thompson | Man in Pied Piper Ad #1 |
| Richard Wharton | Man in Pied Piper Ad #2 |
| Michael I. Goode | Pedestrian
(uncredited) |
| Jenina Moreno | SF Giants Fan
(uncredited) |
| Ed Moy | SF Giants Fan
(uncredited) |
| Ron Saylor | Event Attendee
(uncredited) |
| Sam Vaghani | Pied Piper Engineer
(uncredited) |
| Joseph Walters | Baseball Attendee SF Giants Park
(uncredited) |