Episodes two and four of The Moonbase are held in the BBC Archives and have been released on the triple DVD set, Lost in Time. Episodes one and three are missing. Loose Cannon’s magnificent reconstructions of them can be viewed at the links below.
Loose Cannon’s The Moonbase, Episode 1 part 1
Loose Cannon’s The Moonbase, Episode 1 part 2
Loose Cannon’s The Moonbase, Episode 3 part 1
Loose Cannon’s The Moonbase, Episode 3 part 2
The Moonbase was originally broadcast in the UK between 11 February and 4 March 1967. Episodes 2 and 4 are available on the triple DVD set Lost in Time
The Doctor Who Mind Robber 