Black Mirror stepped things up a gear with USS Callister. The anthology series, once a humble Channel 4 production, had recently been purchased by free-spending Netflix chiefs. This big budget season four episode – telling the story of a tyrannical video game creator who traps his staff inside a Star Trek-esque computer simulation – was the show's most cinematic offering to date.

Paul Giamatti and Charlie Brooker explore the pain of grief and the future of AI in a haunting 'Black Mirror' episode about death and memory.

Black Mirror has become a must-watch for millions, and with the success of the TV show, its celebrity cast has grown bigger each season. But creator and writer Charlie Brooker tells 9honey Celebrity the big names wanting a part in the anthology series don't just get to walk onto set,