Last updated 02 January 2017
Broadcast: Wednesday 16th March 2016
11:30pm-12:00am EDT (03:30 GMT) « »
Featuring: Peter Davison, Janet Fielding, Sarah Sutton, Matthew Waterhouse, Anthony Ainley
The Zero Room is gone and the Doctor's regeneration is dangerously unstable. To help him, Tegan locates the tranquil world of Castrovalva and the TARDIS heads there.
Synopsis Source: Doctor Who Guide
Broadcast Source: Retro TV