With one of the archaeologists transformed and a massive implosion threatening, the Fendahl and its Fendahleen components start coming into existence while the Doctor, Leela and the Tylers do what they can to stop it.
Did You Know?
Maximilian Stael was originally going to commit suicide on-camera. This was cut for being too dark. See more
When the Doctor returns to remind Jack, "remember, three minutes", he holds up his hand to show four fingers instead of three. See more