Oh! Heavenly Dog is a 1980 American fantasy comedy film written by Rod Browning and directed by Joe Camp, their third collaboration in films featuring the dog Benji and stars Chevy Chase as a private investigator who is reincarnated as a dog to solve his own murder. Jane Seymour and Omar Sharif co-star in the film, released by 20th Century-Fox. The screenplay was based loosely on the 1951 film You Never Can Tell starring Dick Powell.

Plot

On a rainy day in London, private investigator Benjamin Browning accepts a ride from his friend, Freddie, who is a dangerous driver. As Freddie drops Benjamin near his office, the investigator collides on the street with writer Jackie Howard. When Benjamin asks her for a date, she tells him to contact her upon her return from Paris. Back at his office, Benjamin's secretary, Margaret, leaves for lunch, and a stranger named Quimby Charles, claiming to be a member of Parliament, proposes to hire Benjamin as a bodyguard for a friend, Mrs. Patricia Elliot. Benjamin is uncertain, but Quimby offers a great deal of money. Benjamin accepts the assignment and goes to visit Patricia at her flat, where he discovers the door unlocked. As he searches the residence, decorated with artwork, he discovers Patricia dead on the bedroom floor, bleeding from a knife wound. Suddenly, an intruder fatally stabs Benjamin, steals Patricia's gold pendant and leaves.