Sam Dalmas is a fictional character from the 1970 film The Bird with the Crystal Plumage, directed by Dario Argento. He is an American writer living in Italy who becomes embroiled in a series of murders after witnessing an attempted killing. His character is central to the film's suspenseful plot, as he tries to uncover the identity of the killer. Throughout the film, Sam faces various challenges and dangers while investigating the case. His journey highlights themes of obsession and the quest for truth, making him a compelling protagonist in the giallo genre, which is known for its blend of mystery and horror elements.