Romana experiments with regeneration while the Doctor prepares to land on a world that is experiencing periodic earthquakes and seems strangely familiar to him.

The Doctor arrives at Davros's hidden location in the bunker ahead of the Daleks, and questions Davros about how he has survived all this time. The Doctor then threatens his way out. Romana is taken hostage by the Movellans in order to get the Doctor to submit to their will while the Doctor confirms his suspicions about the Movellans.