Who Done It? This movie debut for saucy British TV comic Benny Hill has Benny leaving his job as a sweeper after winning some money. He becomes a private detective and investigates a plot to assassinate British scientists. Details Casts Videos Galleries Posters Title Who Done It? Release Date 1956-03-20 Runtime 01 Hours 25 Minutes Genres Comedy Crime Production Companies Ealing Studios Production Countries United Kingdom Benny Hill... Hugo Dill... Belinda Lee... Frankie Mayne... David Kossoff... Zacco... Garry Marsh... Det. Inp. Hancock... Denis Shaw... Professor Stumpf... Ernest Thesiger... Sir Walter... George Margo... Barakov... Frederick Schiller... Gruber... Thorley Walters... Raymond Courtney... Stratford Johns... PC Coleman... Warwick Ashton... PC Roberts... Norah Blaney... The Actress... Charles Hawtrey... Disc Jockey... Nicholas Phipps... Scientist... Peter Bull... Scientist... Gibb McLaughlin... Scientist... Ernest Jay... Scientist... Harold Scott... Scientist... Terence Alexander... Radio Show Official (uncr... Irene Handl... Customer (uncredited)... Arthur Lowe... Shop demonstrator (uncred... Glyn Houston... Arresting Policeman (uncr... Jeremy Hawk... Himself... Philip Stainton... Frankie's Agent... Who Done It? (1956) Original Trailer [FHD] (Trailer) Original Size (1280x720) Original Size (1280x720) Original Size (1000x1500) Original Size (960x1440)