1978, The last story of season 15 (6 episodes)
Shimmering, mind-reading, non-corporeal aliens are too powerful for the Time Lords to thwart, so The Doctor has to trick everyone by becoming Time Lord President and de-activating the forcefield that protects Gallifrey. Only then will the mysterious Vardans reveal their true form – white dudes in jumpsuits. The Doctor institutes a ‘time lock’ which nullifies the Vardans in some hand-wavey fashion, but the lack of forcefield allows the warlike Sontarans to invade Gallifrey, with the full force of maybe four or five of them. The Doctor leads them on a merry chase through the bowels of the TARDIS and then shoots them with a space gun.
Overall a pretty embarrassing story that’s tough to slog through, punctuated with a few gags from Tom Baker.
The last story with Leela, I will miss her feisty penchant for knifing people.
Next up: the much better Ribos Operation