A highly sophisticated Program called Ares is sent from the digital world into the real world on a dangerous mission, marking humankind's first encounter with A.I. beings.
| Ares | Jared Leto |
| Eve Kim | Greta Lee |
| Julian Dillinger | Evan Peters |
| Elisabeth Dillinger | Gillian Anderson |
| Athena | Jodie Turner-Smith |
| Kevin Flynn | Jeff Bridges |
| Ajay Singh | Hasan Minhaj |
| Seth Flores | Arturo Castro |
| Caius | Cameron Monaghan |
| Erin | Sarah Desjardins |
| Cyber Security Pete | Aaron Paul Stewart |
| Cross | Roger Cross |
| General McGrath | Roark Critchlow |
| Marcia Lee Hadlow | Katharine Isabelle |
| Stuart Roche | Gary Vaynerchuk |
| Silvio | Kwesi Ameyaw |
| Robin Roberts | Robin Roberts |
| Kara Swisher | Kara Swisher |
| Ajay's Driver | Sandy Robson |
| Encom Engineer #1 | Tal Shulman |
| Encom Engineer #2 | Donald Heng |
| Encom Engineer #3 | Tiffany Alycia Tong |
| Athena's Red Guard #1 | Sakura Sykes |
| F-35 Pilot #1 | Trent Reznor |
| F-35 Pilot #2 | Atticus Ross |
| Pizza Parlor Patron | Shannon Leto |
| Tess Kim | Selene Yun |
| Tess Kim (voice) | Catherine Haena Kim |
| Paranoia-Con Emcee | Bella Poarch |
| TED Speaker | Fei-Fei Li |
| Athena's Red Guard #2 | Lilian Leopold |
| Athena's Red Guard #3 | Brian Ho |
| Police Officer #1 | Curtis Lovell |
| Grid Tech #1 | Cameron Park |
| Grid Tech #2 | Leigh Dickson |
| Gas Station Clerk | Kenneth Tynan |
| Encom Security (Jolene) | Elizabeth Bowen |
| Dillinger Security #2 | Leo Chiang |
| Dillinger Security #3 | Brent Connolly |
| Young Eve Kim | Miru Kim |
| Young Tess Kim | Narsha Kim |
| 1980s News Anchor | Jovana Lara |
| Himself | Curt Sandoval |
| Herself | Jaclyn Lee |
| Himself | Trevor Ault |
| Herself | Zohreen Shah |
| Field Reporter #1 | A Martínez |
| Field Reporter #2 | Adrianna Weingold |
| News Anchor #6 | Monroe Robertson |
| Reporter #1 | Jordan Schultz |
| Reporter #2 | Marke Driesschen |
| Reporter #3 | Yvonne Schalle |
| Mom | Ana Paula Corpus |
| Kid | Paulo Gonzalez Corpus |
| Backstage AD | Nduduzo Leroy Hikwa |
| Baby in Car | Ashlyn Woodruff |
| Baby in Car | Dhillyn Woodruff |
| Encom Video Narrator | Phil Cater |
| Master Control Program (voice) (archival audio) | David Warner |
