Strangely the end scene with Nicholas Courtney was not filmed with Episode 1, but the entire set and the actor were brought back for the final scene, this was because it was a late decision to feature him in an ending scene.
This episode was watched by 8.7 million viewers on its original transmission.
The Master alludes to Johann Wolfgang von Goethe's famous quote: "You must either conquer and rule or serve and lose, suffer or triumph, be the anvil or the hammer."
This episode takes place on Uxarieus in March 2472.
First of two Pertwee serials for both Norman Atykins and Roy Heymann.