Under license from the copyright holders, Criterion has released definitive, and in some cases unique, video editions of such films as Citizen Kane, A Hard Day's Night, It's a Wonderful Life, Robinson Crusoe on Mars, 2001: A Space Odyssey, Jason and the Argonauts, as well as those noted below. Many of these editions are now out of print, usually where the film's copyrights have changed hands or where the copyright holders have decided to release their own version. As a result, many Criterion titles are now collectors' items.