The killer robots are having a quick cigarette outside the church hall.

Filming is underway on the latest series of The Professor, a long-running television drama. Simon Turing has a small part in one episode, his first TV role. His character, David Egan, is due to be infected with a deadly virus and then to go on a murderous rampage. It all sounds great fun.

Location shooting has begun down in Dorset, but all is not well with the production. Long simmering jealousies are rising to the surface and, when a crew member dies in suspicious circumstances, events threaten to spiral out of control.