| cast |
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| Series Regulars | |||
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| Dichen Lachman | Dichen Lachman as Sierra | Eliza Dushku | Eliza Dushku as Echo |
| Enver Gjokaj | Enver Gjokaj as Victor | Fran Kranz | Fran Kranz as Topher |
| Harry Lennix | Harry Lennix as Boyd | Olivia Williams | Olivia Williams as Adelle DeWitt |
| Tahmoh Penikett | Tahmoh Penikett as Paul Ballard | | |
| |||
| Recurring & Guests | |||
| |||
| Amy Acker | Amy Acker as Dr. Claire Saunders | Jamie Bamber | Jamie Bamber as Martin Klar |
| Liza Lapira | Liza Lapira as Ivy | Michael Hogan | Michael Hogan as Bradley Karrens |
| Reed Diamond | Reed Diamond as Laurence Dominic | Summer Glau | Summer Glau as Bennett |