#52: Box Set - K-9 Tales
i) The Invisible Enemy
Release date - June 2008
Box info:
"The Doctor's first ever meeting with K-9, plus the robot dog's very own spin-off special!" 
Back cover info:
"While answering a mayday from a refuelling station on Saturn's largest moon, the TARDIS passes through a mysterious cloud. Alarmed, Leela senses a malevolent presence. The danger turns out to be an intelligent space virus, and the Doctor is soon infected and fighting for control of his mind.
With the Time Lord incapacitated, Leela's only hope lies on a nearby medical satellite. There, help comes in the unlikely coupling of eccentric scientist Professor Marius and his dog-shaped computer, K-9...
But can they save the Doctor before he is utterly consumed by the enemy within?" Special features - Commentary with Louise Jameson (Leela), John Leeson (Voice of K-9), Bob Baker (Writer) and Mat Irvine (Visual Effects Designer)
- Subtitle Information Text
- New CGI Version
- Dreams and Fantasy (dur. 20.27) - The cast and crew recall the making of this story
- Studio Sweepings (dur. 20.34) - A rare opportunity to go behind the scenes on the recording of this story
- Visual Effect (dur. 16.27) - Mat Irvine meets up with his old colleague Ian Scoones at Bray Studios to talk about the visual effects for The Invisible Enemy
- Blue Peter (dur. 4.33) - K-9 meets John Noakes and Shep
- Trailers and Continuities (dur. 3.48)
- Coming Soon Trailer: The Brain Of Morbius (dur. 1.01)
- Photo Gallery
Easter Egg:
Special Features Menu - Highlight 'Visual Effects' - Press 'Left' for logo - Enter for clip of K-9 on 'The Generation Game'