| cast |
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| Series Regulars | |||
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| Tom Payne | Tom Payne as Leon "Bug Boy" Micheaux | Gary Stevens | Gary Stevens as Ronnie Jenkins |
| John Ortiz | John Ortiz as Turo Escalante | Nick Nolte | Nick Nolte as The Old Man |
| Dustin Hoffman | Dustin Hoffman as Chester "Ace" Bernstein | Kevin Dunn | Kevin Dunn as Marcus |
| Dennis Farina | Dennis Farina as Gus Demitriou | Ian Hart | Ian Hart as Lonnie |
| Jason Gedrick | Jason Gedrick as Jerry | Ritchie Coster | Ritchie Coster as Renzo |
| Richard Kind | Richard Kind as Joey Rathburn | Kerry Condon | Kerry Condon as Exercise Girl |
| Jill Hennessy | Jill Hennessy as Veterinarian | | |
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| Recurring & Guests | |||
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| Chantal Sutherland | Chantal Sutherland as Lizzy | Michael Gambon | Michael Gambon as Michael |
| Patrick J. Adams | Patrick J. Adams as Nathan Israel | Shaun Toub | Shaun Toub as Dr. Khan |
| Joan Allen | Joan Allen | | |