The Sontaran Experiment is the third serial of the 12th season of the British science fiction television series Doctor Who, which was originally broadcast on BBC1 on 22 February and 1 March 1975. The serial is set on Earth more than 10,000 years in the future, immediately after the events of The Ark in Space. In the serial, the Sontaran Field Major Styre (Kevin Lindsay) performs experiments on humans he trapped there as part of the Sontarans' invasion stratagem.