Peter Davison is on a new journey to discover everything he can about the Doctor's Companion. What exactly is a companion's role, how do you actually become a companion, what do they have in common and how have the companions changed over the years?

Credits

Nathan LandegDirector

Peter DavisonSelf / The Doctor (archive footage)

Freema AgyemanSelf / Martha Jones (archive footage)

Colin BakerSelf / The Doctor (archive footage)

Tom BakerSelf / The Doctor (archive footage)