An American movie company wants to shoot a science-fiction film using a British army barracks as a location, and its soldiers as actors.

Hancock's Half Hour is a BBC television comedy series of the 1950s and 60s written by Ray Galton and Alan Simpson. The series starred Tony Hancock with Sid James. The final series, renamed simply Hancock, starred Hancock alone. Comedian Tony Hancock starred in the show, playing an exaggerated and much poorer version of his own character and lifestyle, Anthony Aloysius St John Hancock, a down-at-heel comedian living at the dilapidated 23 Railway Cuttings in East Cheam. The series was influential in the development of the situation comedy, with its move away from radio variety towards a focus on character development.

Anthony Hancock gives up his office job to become an abstract artist. He has a lot of enthusiasm, but little talent, and critics scorn his work. Nevertheless, he impresses an emerging very talented artist. Hancock proceeds to con the art world into thinking he is a genius.