Tom Harper Director, Producer Phoebe Fox Kate Actor Ben Chaplin Gary Actor Sophie Okonedo Philippa Actor Kerry Fox Maria Actor Shaun Evans Tom Actor Nathan Stewart-Jarrett Austin Actor Adeel Akhtar Mo Actor Nicholas Burns James Actor Antony Sher David Actor Morgan Walters Frank Actor Jack Thorne Screenwriter Daniel Baur Executive Producer Mike Brett Executive Producer Steve Jamison Executive Producer Ivana Mackinnon Executive Producer Oliver Simon Executive Producer Lauren Dark Producer Jack C. Arnold Original Music