Guillem Morales Director Naomie Harris Heather Actor, Executive Producer Natalie Dormer Carla Actor, Executive Producer Dominic Allburn Simon Actor Jack Morris Tel Actor Leah Mondesir-Simmonds Young Heather Actor Rupert Holliday-Evans Jim Actor Jake Donald-Crookes David Actor Sally Goodman Old Lady Actor Morgan Lloyd Malcolm Screenwriter Maxime Cottray Producer Nate Bolotin Producer Sean Sorensen Producer Matthew B. Schmidt Producer Leonora Darby Producer James Harris Producer Nick Spicer Executive Producer Aram Tertzakian Executive Producer Ali Jazayeri Executive Producer David Gendron Executive Producer Mark Lane Executive Producer Dean Buchanan Executive Producer John Sorapure Cinematographer Joe Randall Cutler Film Editor Ryan Morrison Film Editor