Howard Overman Creator, Writer Karla Crome Jess Actor Joseph Gilgun Rudy Wade Actor Nathan McMullen Finn Actor Matt Stokoe Alex Actor Shaun Dooley Greg Actor Justin Edwards Roger Actor Charlie Murphy Grace Actor Francis Magee Dan Actor Iwan Rheon Simon Actor Lauren Socha Kelly Actor Nathan Stewart-Jarrett Curtis Actor Antonia Thomas Alisha Actor Matthew McNulty Seth Actor Petra Fried Executive Producer Murray Ferguson Executive Producer Kate Crowe Producer Jon Brown Writer Jonathan Van Tulleken Director