Stephen Harold Tobolowsky is an American character actor. He is known for film roles such as insurance agent Ned Ryerson in Groundhog Day and amnesiac Sammy Jankis in Memento, as well as such television characters as Commissioner Hugo Jarry in Deadwood, Bob Bishop in Heroes, Sandy Ryerson in Glee, Stu Beggs in Californication and White Famous, "Action" Jack Barker in Silicon Valley, Dr. Leslie Berkowitz in One Day at a Time, Principal Earl Ball in The Goldbergs, and Dr. Schulman in The Mindy Project.

Groundhog Day is a 1993 American fantasy romantic comedy film directed by Harold Ramis from a screenplay by him and Danny Rubin. Starring Bill Murray, Andie MacDowell, and Chris Elliott, it tells the story of a cynical television weatherman covering the annual Groundhog Day event in Punxsutawney, Pennsylvania, who becomes trapped in a time loop, forcing him to relive February 2 repeatedly. The film also features Stephen Tobolowsky, Brian Doyle-Murray, Marita Geraghty, Angela Paton, Rick Ducommun, Rick Overton, and Robin Duke in supporting roles.