"Calvin Klein" is the alias taken by Marty McFly after Lorraine Baines noticed the name on his purple underwear. She assumed it to be Marty's name, but it was actually that of the manufacturer and person who founded the company.
- Back to the Future
- Back to the Future Part II
- Back to the Future: The Game
- Back to the Future: The Game - Episode 4: Double Visions (Mentioned only)