| Elyes Gabel | Walter O'Brien |
| Katharine McPhee | Paige Dineen |
| Eddie Kaye Thomas | Toby Curtis |
| Jadyn Wong | Happy Quinn |
| Ari Stidham | Sylvester Dodd |
| Robert Patrick | Cabe Gallo |
| David Fabrizio | Merrick |
| Brendan Hines | Drew |
| Riley B. Smith | Ralph Dineen |
| Jamie McShane | Patrick Quinn |
| Keith David | Warden |
| Brennan Feonix | Swat Leader |
| Nick Gracer | Thug #1 |
| Glenn Keogh | Sean O'Brien |
| Rocky Marquette | Percy Tate |
| Robert Smythe | Teenage Walter |
| Vladimir Tevlovski | Thug #2 |
| Carla Toutz | Walter's Mom |
| Daniel Zolghadri | Young Walter |
| Julie Grant | Olivia |
| Wes Cheers | Prisoner |
| Mark Casimir Dyniewicz Jr. | Inmate |