Willard (1971)

Willard Stiles (Bruce Davison, Insidious: Chapter 4) is a young man with a big problem. He lives alone in a crumbling house with his ailing mother (Elsa Lanchester, Arnold, Bride of Frankenstein). His boss, Al Martin (Ernest Borgnine, Escape from New York) is a vulgar, cruel man who stole his business from Willard's father and is now working Willard to death at his factory job.

Lonely, depressed and isolated, Willard is on the verge of a breakdown when he makes a new friend: Ben, one of the many rats who inhabit his dilapidated home. Not only can Willard communicate with the rodent, but he can actually command him to do his bidding. Using Ben and his furry friends as instruments of retaliation, Willard commands his pets to carry out his vengeance…