Notorious is a 1946 American spy film noir directed and produced by Alfred Hitchcock, starring Cary Grant, Ingrid Bergman, and Claude Rains as three people whose lives become intimately entangled during an espionage operation. The film follows U.S. government agent T.R. Devlin (Grant), who enlists the help of Alicia Huberman (Bergman), the daughter of a German war criminal, to infiltrate a Nazi organization. The situation becomes complicated when the two fall in love as Huberman is instructed to seduce Alex Sebastian (Rains), a leader of the organization who had previously been infatuated with
You can stream Notorious (restored) (1946, BW cinematography benchmark, imdb score: 8) free and legally on OldReel, via the Internet Archive.
Yes — it is in the public domain and can be watched and shared freely.