David Morrissey Martin Actor Jenna Coleman Beattie Actor Maxine Peake Nadia Actor Steve Speirs Mitch Actor Kadiff Kirwan Sam Actor Olly Hudson-Croker Connor Actor Reece Shearsmith Aidan Actor, Writer Debbie Rush Julia Actor Rebecca Callard Controller Actor Sara Kestelman Therapist Actor Jill Halfpenny Jennie Actor Ralf Little Phil Actor Malik Ibheis DC Dobson Actor Gaby French Mia Actor Steve Pemberton Adrian Actor, Writer, Director Ioanna Kimbook Angel Actor Tom Goodman-Hill DI Hewson Actor Dipo Ola Calvin Actor Bobby Schofield Patrick Actor Sandra Gayer Diana Actor Guillem Morales Director Adam Tandy Producer Matt Lipsey Director