"The Chateau McCloud Caper" aired on January 26, 1951, and revolves around detective Sam Spade receiving a request to investigate a series of incidents at a luxurious mountain chateau. Guests attending a ski weekend find themselves embroiled in a mystery when a murder takes place amidst the glamor. As Spade delves deeper, he uncovers sinister motivations and the intricate webs of deceit surrounding the guests, ultimately leading to a climactic resolution. This episode showcases the clever writing and captivating characters that made the series popular.