In the latest instalment of his Doctor Who 50th anniversary quest to interview someone connected with every single Doctor Who story, Toby Hadoke meets someone who's appeared alongside David Tennant but has had more brushes with Who history than he can count...

He may not have had a name but he is not alone in being a Doctor Who fan and actor, and has fond memories of working with the Tenth Doctor. But he's also met the Fourth as a fan, a director on a train, and was at school with Terry Nation's daughter. Lots to discuss then, in the episode of Who's Round, fact fans, that has the most background noise.

Nominated charity: World Wildlife Fund or Save the Snow Leopards