Oh Heavenly Dog(1980)
Heavenly Dog is a 1980 comedy film, written by Rod Browning. The film stars the dog Benji, Chevy Chase, Jane Seymour, and Omar Sharif. The film was directed by Joe Camp, and released by 20th Century Fox.
Chevy Chase plays a private investigator who is called to a job and is killed upon finding a dead woman. The afterlife has not decided if he is destined for Heaven or Hell, so he is given the chance to return to Earth as a dog, in order to solve the case and earn his way to Heaven.
The first "grown up" movie from benji.