The Wolf Man (1941) is a werewolf-themed American horror film produced and directed by George Waggner. The Wolf Man features Lon Chaney Jr. in the title role as Larry Talbot, who returns home to Llanwelly, Wales, to seek reconciliation with his father. After Talbot is attacked and bitten, he encounters a fortune-teller who reveals to him that it was her son, transformed into a werewolf, who bit him.

Importantly, there is the constant repetition of an ominous poem throughout the film:

"Even a man who is pure in heart, and says his prayers by night;
May become a wolf when the wolfbane blooms and the autumn moon is bright."