Season 15
This season introduced K9 to the series and saw the departure of Leela. 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. The season took a two week transmission break over the 1977 Christmas period, between the broadcast of part four of The Sun Makers and part one of Underworld.
All Episodes
S15 E1: Horror of Fang Rock (1)
S15 E2: Horror of Fang Rock (2)
S15 E3: Horror of Fang Rock (3)
S15 E4: Horror of Fang Rock (4)
S15 E5: The Invisible Enemy (1)
S15 E6: The Invisible Enemy (2)
S15 E7: The Invisible Enemy (3)
S15 E8: The Invisible Enemy (4)
S15 E9: Image of the Fendahl (1)
S15 E10: Image of the Fendahl (2)
S15 E11: Image of the Fendahl (3)
S15 E12: Image of the Fendahl (4)
S15 E13: The Sun Makers (1)
S15 E14: The Sun Makers (2)
S15 E15: The Sun Makers (3)
S15 E16: The Sun Makers (4)
S15 E17: Underworld (1)
S15 E18: Underworld (2)
S15 E19: Underworld (3)
S15 E20: Underworld (4)
S15 E21: The Invasion of Time (1)
S15 E22: The Invasion of Time (2)
S15 E23: The Invasion of Time (3)
S15 E24: The Invasion of Time (4)
S15 E25: The Invasion of Time (5)
S15 E26: The Invasion of Time (6)