An ex-army dog named King inherits a fortune from his eccentric millionaire owner. Should King die, the fortune will pass to the late millionaire's secretary, Ellen (Peggy Dow). Perry Collins (Charles Drake) calls to visit King, ingratiating himself with the story that he remembers King from his army days and that he rescued King from a jeep accident. But Collins has designs on both Ellen and the fortune she will inherit on King's death and when King is found poisoned, King's spirit asks Lion (the leader in the heaven for animals) to send him back to earth to solve his own murder. He returns as Rex Shepard, a private investigator (Dick Powell). Lion also sends Golden Harvest, a racehorse, back to earth as Goldie Harvey (Joyce Holden) to help Rex. Goldie and Rex must solve the case before the full moon or they will have to remain on earth as humans.

• Dick Powell as Rex Shepard
• Peggy Dow as Ellen Hathaway
• Joyce Holden as Golden Harvest / Goldie Harvey
• Charles Drake as Perry Collins
• Albert Sharpe as Grandpa Hathaway
• Lou Polan as Police Sergeant Novak
• Frank Nelson as Police Lieutenant Gilpin
• Will Vedder as Nicholas
• Frank Gerstle as Detective
• Ott George as Detective Lieutenant Louie Luisetti

Writing in AllMovie, critic Hal Erickson reported that the "most delightful aspect of You Never Can Tell is the film's ability to successfully sustain its single joke for 78 minutes," and that it is a "captivating piece of whimsy."^[2]

• Worley, Alec. Empires of the Imagination: A Critical Survey of Fantasy Cinema from Georges Melies to The Lord of the Rings. McFarland, 2005.

• You Never Can Tell at IMDb  
• You Never Can Tell at the American Film Institute Catalog