Dr. Bill Remsen pretends to be a policeman, and ends up being assigned to guard Judy Marlowe. Amazingly, he falls in love with her.

Bing Crosbyas Dr. Bill Remsen
Mary Carlisleas Judy Marlowe
Beatrice Lillieas Mrs. Lorelei Dodge-Blodgett
Andy Devineas Officer Lawrence O'Roon
Rufe Davisas Al (Zookeeper)
Laura Hope Crewsas Mrs. Minerva Twombling
Fred Keatingas Chris LeRoy
John Hamiltonas Insp. Bryce
Sterling Hollowayas Luke (Ice-Cream Man)
Henry Wadsworthas Otis Eaton (The Drunk)