The Marx Brothers' last film as a team finds "ace" detective Groucho searching for stolen diamonds that are hidden in a can of sardines. When happy wanderer Harpo steals the can, unaware of its contents, he needs stage show pianist Chico's help to avoid the crooks who are after the gems. With Ilona Massey, Raymond Burr, and a memorable cameo by a young Marilyn Monroe. 91 min. Standard; Soundtrack: English Dolby Digital stereo.