The Great Brain is a 1978 American film directed by Sidney Levin and based on the Great Brain series of children's books by John Dennis Fitzgerald.

Plot

In 1890s Utah the adolescent Tom Fitzgerald has a reputation as a schemer. Calling himself "The Great Brain", Tom delights in swindling his friends and the residents of his small town. Soon the townsfolk tire of being bamboozled, and Tom finally faces his comeuppance. In the end Tom uses his great brain to save the day and redeem himself. After his friend Andy loses his leg to gangrene and becomes depressed, Tom convinces Andy he can still do chores and play. Tom learns that helping people is more rewarding than swindling them.