What happens when the prime minister suddenly stops being prime minister? One day you're the most powerful person in the country, the next you're irrelevant, forced into retirement 30 years ahead of schedule and find yourself asking 'What do I do now?' "I can't just disappear like Gordon Brown. They say he barely gets out of bed now. Just sits there doing word-searches and eating Kit Kat Chunkies. Miserable. I hate the chunky ones." Former British Prime Minister Henry Tobin This week, a security breach leads to MI5 sending Henry a new personal protection officer. Starring Miles Jupp, Ingrid Oliver, Emma Sidi, Justin Edwards and Mali Ann Rees. Written by Paul Doolan and Jon Hunter Producer: Richard Morris Production co-ordinator: Caroline Barlow Sound recordist and designer: David Thomas A BBC Studios Production