Alan Howard's character Rupert Purvis causes chaos when he jumps off a bridge onto a dog, putting his superior Blair (Sir Alan Bates) and Agent Hogbin (Simon Cadell) in a tricky situation.
The Dog It Was That Died
A daring stunt involving a dog sparks a high-stakes crisis for an MI5 superior, who must convince a surveillance expert to take extreme measures to mitigate the situation.