I absolutely love this story. It starts off surprisingly dark where we're introduced to these people who initially seem to be the main guest characters...and then they kill them off before the Doctor and his companions even arrive!

It's such an effective way to open the story, doing a really great job at teasing rather than showing the threat, and setting the stakes for the rest of the adventures.

The monsters are among 80s Who's finest. The Terileptils are really imposing, and the android they use is brilliantly designed and realised.

The highwayman Richard Mace is absolutely hilarious too. Michael Robbins steals the show in that role on so many occasions, and sets himself firmly among some of Doctor Who's finest guest turns.

I really like how this story also does something that the new series would later take inspiration from also, in that it explains historical mysteries in where the black death plague came from and what started the Great Fire of London. That was a very clever move by the writer Eric Saward.

Poor Tegan getting possessed again though, straight after Kinda! She really did have a rough time with the Doctor.