Special Features
Audio Commentary by actors Richard Franklin (Mike Yates), Peter Miles (Professor Whitaker), Terence Wilton (Mark), designer Richard Morris, script editor Terrance Dicks and Director Paddy Russell, moderated by Toby Hadoke; Additional Commentary by John Levene (Sgt. Benton) for 10 minutes on Part Five; People, Power and Puppetry Making of (32 mins); Deleted Scenes (4 mins); Now and Then (13 mins); Billy Smart's Circus with Jon Pertwee and his Whomobile (1 min); Doctor Who Stories: Elisabeth Sladen Part 1 (14 mins); Option to play Part One in new color-recovered version or pre-existing black-and-white version; Photo Gallery (6 mins); PDF Materials: Radio Times Listings; Production Notes Subtitle Option; Digitally Remastered picture and sound quality