Nightmare of Eden: Part One

Alan Bromly departed in the last block of shooting because of an irreconcilable conflict with Tom Baker, so producer Graham Williams took over. According to accounts by visual effects designer Colin Mapson and assistant floor manager Val McCrimmon, Alan Bromly simply didn't understand how to direct the programme efficiently - and wasn't interested in learning. Consequently, he was removed from the project by Graham Williams. Although Barry Letts had preceded Williams as an "emergency director" (for "Inferno" when the contracted director, Douglas Camfield, was hospitalised with heart problems), this was the only known instance of a producer stepping in for a director that he had been forced to fire. Mapson, longtime veteran of the programme, flatly called it "without doubt, the most disastrous Doctor Who (1963) I've ever been involved in". When production finally wrapped, crew members were presented with T-shirts saying, "I'm Relieved the Nightmare is Over".

When K9 begins cutting a hole in the wall with his nose laser, the oval shaped outline of the section to be cut is already visible underneath the grey surface (probably coloured paper or sticky-backed plastic), revealing that the hole was already cut prior to the scene being filmed.