The Doctor's TARDIS is stolen, and tracking it down reveals the existence of an alien named Kalid controlling events in the past. While the Doctor challenges Kalid's motives for being there, Tegan and Nyssa discover the source of Kalid's power - an even greater threat for the Doctor. Written by
Did You Know?
Although Adric had been killed in the previous episode, Matthew Waterhouse
's contract extended into the filming of Time-Flight, the reason for Adric's illusory appearance in this episode. Waterhouse stated in an interview it was a good point to leave, as Time-Flight "was a terrible story". See more
Apparition of Adric
Go back, Tegan, or you will destroy me.