Clockwise from top left: Tom Baker signs books for young fans in the 1970s; Patrick Troughton meets caterers on location for The Invasion (1968); a signed photo of Jon Pertwee, taken during the lming of The Claws of Axos (1971); Peter Davison signs copies of Peter Davison’s Book of Alien Monsters, published in 1982; a Polaroid signed by Colin Baker for Jamie Lenman on the set of Dimensions in Time in 1993; Peter Capaldi in Cardi. for the premiere of Deep Breath (2014); Carole Ann Ford signs copies of The Dalek Book at a London department store in 1964; Nicholas Courtney signs an autograph during location lming for The Dæmons (1971).