S0E335 : Behind the Sofa: The Invisible Enemy

Louise Jameson (Leela), Colin Baker (The Doctor), Katy Manning (Jo), Sarah Sutton (Nyssa), Janet Fielding (Tegan), Matthew Waterhouse (Adric), Betsan Roberts (wife of late director Pennant Roberts), and Toby Hadoke watch and comment on the Season 15 serial, The Invisible Enemy.