Doctor Who episode 546: The Keeper of Traken – Part One (31/1/1981)
‘No Keeper lasts forever, and the period of transition is always difficult.’ As the show hurtles towards the departure of its leading man, this could almost be a metaphor for the uncertainty surrounding its future. I’m sure this must have partly inspired some of The Keeper of Traken: lines like the defiant, ‘Trakens have survived times like this in the past. We shall do so now’ put a brave face on what must have been a deeply unsettling time behind the scenes.