This is part of a series of reviews of Doctor Who in chronological timeline order.

Previous Story: Hexagora

A satisfying finale to this set of lost stories, but definitely the weakest out of the bunch. It starts off really strong with lots of political conspiracy and manipulation, even if it feels a bit too real at points. It was fairly obvious that the titular Seth didn't exist, but it was stilll a well-handled twist.

The cast are really great in this, Sarah Sutton performs a confused Nyssa who thinks she's the Doctor really well and Peter Davison does a fun job at playing the Doctor imitating Seth. I like that Janet Fielding's Tegan is the main driving force of this story, having to rescue the Doctor rather than the other way around.

Overall, it's a fairly good story (it's got David Warner in it too, he's great in it) but it falls apart towards the end and that's the main reason I can't rate it highly.

Next Story: Secret of Telos