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
 * K9 Mark I - John Leeson

Guest

 * Vince - John Abbott
 * Reuben - Colin Douglas
 * Lord Palmerdale - Sean Caffrey
 * Skinsale - Alan Rowe
 * Adelaide - Annette Woollett
 * Lowe - Michael Sheard
 * Safran - Brian Grellis
 * Professor Marius - Frederick Jaeger
 * Nucleus Voice - John Leeson
 * Nucleus - John Scott Martin
 * Thea Ransome - Wanda Ventham
 * Dr. Fendelman - Denis Lill
 * Maximillian Stael - Scott Fredericks
 * Adam Colby - Edward Arthur
 * Martha Tyler - Daphne Heard
 * Jack Tyler - Geoffrey Hinsliff
 * Cordo - Roy Macready
 * Hade - Richard Leech
 * Marn - Jonina Scott
 * Mandrel - William Simons
 * Goudry - Michael Keating
 * Veet - Adrienne Burgess
 * Bisham - David Rowlands
 * Collector - Henry Woolf
 * Jackson - James Maxwell
 * Herrick - Alan Lake
 * Orfe - Jonathan Newth
 * Tala - Imogen Bickford-Smith
 * Idas - Norman Tipton
 * Voice of the Oracle - Christine Pollon
 * Andred - Christopher Tranchell
 * Kelner - Milton Johns
 * Borusa - John Arnatt
 * Rodan - Hilary Ryan
 * Nesbin - Max Faulkner
 * Presta - Gai Smith
 * Vardans - Stan McGowan, Tom Kelly
 * Stor - Derek Deadman
 * Sontaran - Stuart Fell

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