Season 15

Season 15 of Doctor Who aired from September 1977 and March 1978. This season starred Tom Baker as the Fourth Doctor, Louise Jameson as Leela and John Leeson as K9.

Overview
This season was the last season to feature Leela, and the first to introduce everyone's favourite robot dog, K9. This season also continued the longstanding tradition in the Fourth Doctor's era of ruining the Time Lords, this time having them succumb to an invasion by the Sontarans, of all things.

Episodes

 * Horror of Fang Rock
 * The Invisible Enemy
 * Image of the Fendahl
 * The Sun Makers
 * Underworld
 * The Invasion of Time