Answer
Thomas Mitchell played the role of Doc Boone in the 1939 film Stagecoach. Boone was a surgeon and a gambler who was traveling to Tombstone, Arizona to meet with his estranged wife. He was a hard-drinking, foul-mouthed man, but he also had a kind heart and a strong sense of justice. Boone was one of the most popular characters in the film, and Mitchell's performance was critically acclaimed.