The Invisible Enemy: The TARDIS is infiltrated by the Swarm - a space-borne intelligence that wishes to spread itself across the universe - and the Doctor is infected by its nucleus. The ship then materialises on Titan, one of the moons of Saturn, where the human occupants of a refuelling station have also been taken over. This Doctor Who adventure was the first to feature K9.
K9 And Company: Sarah Jane Smith pays a Christmas visit to her Aunt Lavinia's house in the village of Moreton Harwood. She discovers that Lavinia, a noted scientist, has yet to return from a lecture tour of the USA. She does however meet Brendan - Lavinia's ward - and Commander Bill Pollock - her partner in a small market garden business. Also in the house, in a box sent to her by the Doctor, she finds K9. Brendan is kidnapped by a local coven of witches who want to sacrifice him to the goddess Hecate. Sarah, with K9's assistance, sets out to try and foil their plan.
The Invisible Enemy
Commentary. With actors Louise Jameson and John Leeson, visual effects designer Mat Irvine and co-writer Bob Baker
Dreams and Fantasy - artistes and production crew recall the making of this story and even take the original K9 for walkies. With actors Louise Jameson and John Leeson, director Derrick Goodwin, co-writer Bob Baker, visual effects designers Tony Harding and Mat Irvine, K9 operator Nigel Brackley, journalist Gary Gillatt
Studio Sweepings - a rare opportunity to go behind the scenes on the recording of this story, courtesy of a timecoded Shibaden videotape recorded for production use.
Visual Effect - Visual effects designer Mat Irvine meets up with his old colleague Ian Scoones at Bray Studios to talk about the visual effects for 'The Invisible Enemy' and other stories
Blue Peter - K9 meets John Noakes and Shep in this extract from the long-running children's magazine show
CGI Effects - this gives the viewer the option to watch the story with many of the original video effects sequences replaced by CGI versions
Trailers and Continuity
Radio Times Listings
Subtitle Production Notes
K9 and Company
Commentary - With actors Elisabeth Sladen, John Leeson, Linda Polan and script editor Eric Saward
The K9 Files - key production personnel look at the making of this story and K9's subsequent life in books and comic strips. With actors Elisabeth Sladen, John Leeson, writer and co-creator of K9, Dave Martin, script editor Terrance Dicks, director John Black, visual effects designer Mat Irvine and journalist Moray Laing
K9 - A Dog's Tale - K9 himself answers a selection of questions about his life
Pebble Mill at One - K9's appearance on the Christmas 1981 edition of the BBC1 lunchtime magazine show
Trails and Continuities
Coming Soon Trailer
K9 Stories - four books for younger children - 'K9 and the Beasts of Vega', 'K9 and the Missing Planet', 'K9 and the Time Trap' and 'K9 and the Zeta Rescue' - and the K9
Radio Times Listings
Subtitle Production Note