Unassuming locksmith Earnest is duped into opening a strongbox, gets thrown in the slammer, and is befriended by further gangsters in prison who prove that there is no honor among thieves.
Charlie Drake's expert locksmith never goes anywhere without his emergency tool kit, repeatedly gets duped into unknowingly pulling robberies by a suave Dennis Price and ends up in the nick with Percy Herbert and (in a bit part) Ronnie Barker.
Easily this comic's best and most sophisticated vehicle, a daft and sometimes inspired farce with fine support from George Sanders and Eddie Bryne as rival master crooks and from a young Nyree Dawn Porter who wears a winning smile throughout. Surprisingly good.
A dry little gem of pre-Python Britishness