Desc: Into Thin Air: Directed by Roger Young. With Ellen Burstyn, Robert Prosky, Sam Robards, Nicholas Pryor. Ellen Burstyn stars as the Canadian mother of a college student who vanishes mysteriously while driving back to school in the states. After having no luck from the police, she hires a private detective (Robert Prosky) to help her. Their tenacious pursuit of clues uncovers the grim details of her son's fate, leading to a shocking climax.