Answer
In the acclaimed 1940 film adaptation of John Steinbeck's novel "The Grapes of Wrath," John Carradine portrayed the charismatic and influential "Preacher Casy." Casy's character, a former minister turned itinerant laborer, serves as a spiritual guide and moral compass for the Joad family during their arduous journey during the Great Depression. Carradine's powerful performance captures the essence of Casy's unwavering faith and his deep compassion for the downtrodden.