The Doctor kicks off this new run of adventures by searching for his companion Clara - an Impossible Girl he's already lost twice. The action grows and the Doctor's oldest secret threatens to be revealed as the world's longest running science fiction series builds toward its explosive 50th anniversary in November 2013.
The Doctor returns, alongside newly weds Amy and Rory, to face monsters and mysteries and adventures all across time and space. Together they find themselves in sixties America, battling the invasion the world forgot, then aboard a pirate ship on the high seas of 1696, to solve the mystery of the Siren. In a bubble universe at the edge of reality, the Doctor meets an old friend with a new face.
The Doctor (Tom Baker) returns with his companions Romana (Lalla Ward) and Adric (Matthew Waterhouse).
Season 15 continues to follow the adventures of the Doctor (Tom Baker) and Leela (Louise Jameson), while it also introduces a new character, K9 (voiced by John Leeson).
Peter Davison continues to star as the Doctor along with his companions Tegan (Janet Fielding), Turlough (Mark Strickson) and Peri (Nicola Bryant) until the end of "The Caves of Androzani". From that point, Colin Baker takes over as the Doctor.