Description: The Invisible Enemy - While answering a mayday from a refuelling station on Saturn's largest moon, the TARDIS passes through a mysterious cloud that carries a space virus. The Doctor is soon infected and fighting for control of his mind. Leela's only hope lies on a nearby medical satellite, where she seeks help from eccentric scientist Professor Marius and his dog-shaped computer. Stars Tom Baker as the 4th Doctor and Louise Jameson as companion Leela; also features the first appearance of K9 (voiced by John Leeson).
K9 and Company: A Girl's Best Friend - Sarah Jane Smith (Elisabeth Sladen) is looking forward to spending a quiet Christmas with her Aunt Lavinia in the sleepy village of Morton Harewood. But when she arrives, she finds her aunt missing, and a surprise present from an old friend waiting to be opened. Sarah and her aunt's ward, Brendan, are soon caught up in the affairs of a mysterious cult who practice the black arts, and are preparing for a human sacrifice. But Sarah has the Doctor's gift to help them - a robot dog who answers to the name of K9. A spin-off pilot which was not picked up, this was broadcast as a 1981 Christmas special.
Features:
Disc 1: The Invisible Enemy
Audio Commentary with actors Louise Jameson and John Leeson, visual effects designer Mat Irvine and co-writer Bob Baker
Dreams and Fantasy Making-of (20 mins)
Studio Sweepings Behind the scenes (20 mins)
Visual Effect Mat Irvine and Ian Scone discuss the story's visual effects (16 mins)
Blue Peter (4 mins)
Optional CGI Effects
Trailers and Continuities (5 mins)
Photo Galleries (8 mins)
Easter Egg (1 min)
Disc 2: K9 and Company: A Girl's Best Friend
Audio Commentary on K9 & Co. with actors Elisabeth Sladen, John Leeson, Linda Polan and script editor Eric Saward
