Doctor Who: 10 Stories You Must Rewatch After The Power Of The Doctor
5. Logopolis
Just as the Master is being taken to his secure cell at UNIT in The Power of the Doctor, he happens to see Tegan and Ace, and decides to mess with them. He begins by asking Tegan how her aunt is, who was another unfortunate victim of the Master.
At the start of 1981's Logopolis, we see a young Tegan Jovanka getting a lift to work from her aunt Vanessa. En-route, the car has a flat tyre, leaving Tegan to step inside a nearby police box to ask for help. This police box is of course the TARDIS, and Tegan gets accidentally swept up in Tom Baker's final outing as the Fourth Doctor.
Tegan's aunt isn't so lucky however, and is killed by the Master using his famous tissue compression technique. The callback to this tiny scene in Logopolis really shows off the dark and disgusting side of the Master in Jodie Whittaker's final episode.