Starring Jon Pertwee

Commentary, with actors Katy Manning, Bernard Kay and Morris Perry, director Michael Briant, script editor Terrance Dicks and assistant floor manager Graeme Harper. Moderated by Toby Hadoke.
'IMC Needs You!' - the cast and crew look back at the making of the story, with Katy Manning, Bernard Kay, Michael Briant, Barry Letts, Terrance Dicks and Graeme Harper.
'From the Cutting Room Floor' - an annotated selection of unused trims from the story’s location and model filming.
Photo gallery, featuring production, design and publicity photos from the story.
A trailer for a forthcoming DVD release.
Radio Times listings in Adobe PDF format.
Programme subtitles.
Subtitle Production Notes