Young Frankenstein

Young Frankenstein. 1974 20th Century Fox.
Starring: Gene Wilder, Peter Boyle, Marty Feldman, Teri Garr, Madeline Kahn, Cloris Leachman, Kenneth Mars, Gene Hackman, Mel Brooks (uncredited)
Director: Mel Brooks
Available at Amazon as a single DVD, or as part of the Mel Brooks Collection.

Dr. Frederick Frankenstein (Wilder) is the grandson of Victor Frankenstein, as well as a professor at an American medical school. Frederick would prefer not to discuss his grandfather, insisting that his surname is pronounced "Fronk-en-steen". However, he still inherits his family's estate in Transylvania, and travels there, without his fiancee Elizabeth (Kahn). Frederick meets his new lab assistant Inga (Garr) along with Frau Blücher (Leachman) and Igor (Feldman). Igor insists that his name is pronounced "Eye-gor", and don't you forget it.

Late one night, Inga and Frederick discover the secret entrance to his grandfather's laboratory via a fake bookcase. Frederick reads his grandfather's journals, and is inspired to resume Victor's experiments in reanimating the dead. He and Igor steal the enormous corpse of a recently executed criminal, but Igor steals the wrong brain from the local "brain depository". Successfully reviving the monster (Boyle), it attacks Frederick after Igor strikes a match, which means it must be sedated. Igor also gets attacked when he reveals that he supplied "Abby Normal's" brain.

The locals are concerned about Frederick continuing his grandfather's work, and Inspector Kemp (Mars) pays him a visit, demanding assurance that he's not creating another monster. Frederick learns from Frau Blücher that the monster loves music, which he uses to lure the escaped monster back to the castle on one occasion. Eventually, he teaches the monster some basic commands, followed by their version of "Puttin' on the Ritz". The monster is later captured by the police, but escapes, and manages to win over Elizabeth, who is in town to surprise Frederick.

Kemp leads a mob to the castle just after Frederick, who by now has fully embraced his heritage, had brought his monster back home. Before they can take any action, Frederick transfers some of his stabilizing intellect to the creature, who can now reason with and placate the mob. The monster marries Elizabeth, while Frederick and Inga marry.

One of the great American comedies of all time, featuring an amazing performance from Wilder. Highly, highly recommended.