Star Trek

Star Trek is an American media franchise based on the science fiction television series created by Gene Roddenberry. The first television series, simply called Star Trek and now referred to as The Original Series, debuted in 1966 and aired for three seasons on the television network NBC. It followed the interstellar adventures of Captain James T. Kirk (William Shatner) and his crew aboard the starship USS Enterprise, a space exploration vessel, built by the United Federation of Planets in the twenty-third century.

The Two Ronnies version shows Captain Kirk (Corbett) and Mr Spock (Barker) investigate a strange energy field, which is causing physical changes in certain members of the crew.

Trivia
Based on the stardates mentioned in Kirk's log entries (2150 and 2172), this story takes place between the Original Series episodes Balance of Terror and What Are Little Girls Made Of?