Caity Lotz Ava Toby Stephens Vincent McCarthy Denis Lawson Thomson Sam Hazeldine James Pooneh Hajimohammadi Suri Jonathan Byrne Tim Jade Croot Mary John-Paul Macleod Paul Dawson (as John Paul Macleod) Siwan Morris Lucy Nicola Reynolds Joan Sule Rimi Dr. Giwa-Amu Joshua Higgott Assistant (Dr. James) Richard Shackley Checkpoint Guard Paul James Doctor (on computer screen) Caity Lotz Ava Toby Stephens Vincent McCarthy Denis Lawson Thomson Sam Hazeldine James Pooneh Hajimohammadi Suri Jonathan Byrne Tim Jade Croot Mary John-Paul Macleod Paul Dawson (as John Paul Macleod) Siwan Morris Lucy Nicola Reynolds Joan Sule Rimi Dr. Giwa-Amu Joshua Higgott Assistant (Dr. James) Richard Shackley Checkpoint Guard Paul James Doctor (on computer screen) Lee Nicholas Harris Implant Soldier Harris Stuart Matthews Soldier