Season 15

The fifteenth season of Doctor Who ran between 3 September 1977 and 11 March 1978. This season introduced K9 to the series and saw the departure of Leela. It consisted of six serials and twenty-six episodes. It was originally intended to include Terrance Dicks' story The Vampire Mutations but, due to a major BBC production of Dracula, it was postponed. It later became Season 18's State of Decay. To replace it, Dicks quickly scripted the season opener, Horror of Fang Rock.

Recurring

 * The Fourth Doctor - Tom Baker
 * Leela - Louise Jameson (leaves in The Invasion of Time)
 * K9 Mark I - John Leeson (voice; introduced in The Invisible Enemy, leaves in The Invasion of Time)

VHS

 * Horror of Fang Rock (1998)
 * The Invisible Enemy (2002)
 * Image of the Fendahl (1993)
 * The Sun Makers (2001)
 * Underworld (2002)
 * The Invasion of Time (2000)
 * The Tom Baker Years (excerpts of all the stories) (1991)

DVD
All serials of season 15 were released individually in between 2005 and 2011.

Novels

 * Doctor Who and the Horror of Fang Rock
 * Doctor Who and the Invisible Enemy
 * Doctor Who and the Image of the Fendahl
 * Doctor Who and the Sunmakers
 * Doctor Who and the Underworld
 * Doctor Who and the Invasion of Time