Doctor Who: The Sontaran Experiment

THE SONTARAN EXPERIMENT -After defeating the Wirrn, the Doctor is ready to return to Earth, but there appears to be a fault in the transmat system. They land on a planet and the Doctor goes down with Harry and Sarah to put the equipment in correct working order. The travellers find, to their surprise, that there are other visitors on the planet. There is the crew of a spaceship from another Earth colony. And there is Field Major Styre, a Sontaran. Styre is making a report on the planet as preliminary to an invasion. This in turn will precede a take-over of the galaxy. His report includes brutal experiments to assess the potential of resistance and he captures Sarah. The Doctor challenges Styre to physical combat to enable Harry to remove the terrulian diode bypass transformer from the Sontaran ship. When Styre attempts to re-power, he finds himself drained of energy. Earth is safe for resettlement by the human race.

The Doctor (Tom Baker, Monarch of the Glen), Sarah Jane and Harry return from the space station Nerva Beacon to a future Earth, a place long abandoned by the human race. But soon they discover a shipwrecked crew of human astronauts being hunted down by a creature that lives in the rocks. What is the purpose of their lethal tests, and can the Doctor ensure the safety of the Earth for future generations of humankind? Extras include audio commentary by actress Elisabeth Sladen, co-writer Bob Baker and producer Philip Hinchcliffe; Built for War, a specially produced 39-minute Sontaran-focused documentary featuring Terrance Dicks, Elisabeth Sladen, Anthony Read, Colin Baker, Nicola Bryant and many others.

Cast
The Doctor - Tom Baker
Harry Sullivan - Ian Marter
Sarah Jane Smith - Elisabeth Sladen
Erak - Peter Walshe
Krans - Glyn Jones
Prisoner - Brian Ellis
Roth - Peter Rutherford
Styre / The Marshal - Kevin Lindsay
Vural - Donald Douglas
Zake - Terry Walsh
Production Credits
Director - Rodney Bennett
Assistant Floor Manager - Russ Karel
Costumes - Barbara Kidd
Designer - Roger Murray-Leach
Fight Arranger - Terry Walsh
Incidental Music - Dudley Simpson
Make-Up - Sylvia James
Producer - Philip Hinchcliffe
Production Assistant - Marion McDougall
Production Unit Manager - George Gallacio
Script Editor - Robert Holmes
Special Sounds - Dick Mills
Title Music - Ron Grainer and the BBC Radiophonic Workshop, arranged by Delia Derbyshire
Visual Effects - John Friedlander
Visual Effects - Tony Oxley
Writer - Bob Baker
Writer - Dave Martin