A universally overrated diversion, Mister Roberts is a pleasant diversion but not a lot more. The story of the most boring ship in the WWII-era Navy (a lowly cargo ship), we find its denizens desperate for action, resorting to pulling practical jokes for kicks. Among them are Jack Lemmon (who won an Oscar for a trivial role) and Henry Fonda, who proves unilaterally that he was not made for comedy, but James Cagney's crazed captain steals the show. The last half-hour of the film is depressing.