4B. Doctor Who - The Sontaran Experiment

Season Twelve

Script Editor: Robert Holmes; Writers: Bob Baker and Dave Martin; Produced by: Philip Hinchcliffe; Director: Rodney Bennett; Designer: Roger Murray-Leach; Incidental Music: Dudley Simpson; Fight Arranger: Terry Walsh (2);

The Doctor, Harry and Sarah trans-mat down from the Nerva beacon and arrive on Earth in the far future. So much time had passed since the solar flares that Earth has returned to a graceful state with no buildings or animals.

On the planet there is also the crew of a crashed spaceship who were slowly being killed. The killer was a Sontaran who was conducting experiments on humans to see the viability of an invasion.

Sarah was also captured and the experiment was to test her fear threshold. The Doctor challenged the Sontaran to a duel, as is the Sontaran custom.

The Sontaran, not used to Earth's gravity, quickly tired, and returned to his ship to re-energise. Harry had been told by the Doctor how to sabotage the Sontaran energy unit, and instead of re-energising the energy fed off the Sontaran.

Regular cast

Sarah Jane Smith: Elisabeth Sladen;

Guest cast

Harry Sullivan: Ian Marter; Field Major Styre: Kevin Lindsay; Krans: Glyn Jones; Erak: Peter Walshe; Vural: Donald Douglas; Roth: Peter Rutherford; Zake: Terry Walsh (1); Marshal: Kevin Lindsay (2); Prisoner: Brian Ellis (2);
Uncredited cast: Double for the Doctor: Terry Walsh; Double for Harry: Terry Walsh (1); Double for Styre: Stuart Fell (1);

First showing

Channel Episode Title Date Viewers Position
BBC 1390Part OneSat 22 February 19755:30 pm - 5:55 pm11.0M18th
BBC 1391Part TwoSat 1 March 19755:30 pm - 5:55 pm10.5M17th

Repeats (on the BBC)

Outside filming

Hound Tor, Nr. Manaton, Devon;

Studio filming

This programme does not have any studio filming

Bloopers and mistakes

You can see a car in the background of one scene, and there's a farm cottage visible in the background at one point.

Episode 2: Watch when the Doctor is fighting with Styre: in the long shots he's standing up straight, but in the close-ups, he's crouched over.

Notes and trivia

Glyn Jones, who here plays Krans, also wrote the novelisation of the Space Museum.

Working titles

The Destructors;