Richard Pryor plays Eddie Lenahan, a con man who has just been arrested and faces a year in jail. When he comes up before the judge, he fakes a mental episode and his lawyer pleads insanity. He manages to end up in a hospital for a mental examination, when a huge storm knocks all the power out in the building. Whilst Eddie moves up the hospital looking for his file and a way of escape, he is mistaken for a Dr. Kevin Slattery. It's up to Eddie to try and pass as a doctor and figure out a way of getting power back to the hospital.
Pryor is great as only he can be, he manages to be hilarious but has the odd touching scene which he handles well. There's some great support from Rachel Ticotin, Joe Mantegna, Bob Dishy, Randall Cobb and Jon Polito. There's also a small role for a young Wesley Snipes. It's directed by Michael Apted, the director of Gorky Park, Gorillas In The Mist, Extreme Measures and The World Is Not Enough. It wasn't a cheap movie either, with it having a $14,000,000 budget.
Obviously you have to suspend your disbelief at the fact he passes himself off as a doctor for so long, but in a silly comedy I don't think it really matters. My personal favourite Pryor movies are the films he made with Gene Wilder, they had a brilliant chemistry that has rarely been matched. This isn't the greatest movie you'll ever see, but if you enjoyed Brewster's Millions, Bustin' Loose or any of the films he did with Wilder, then you should enjoy this.