After being told by her boss to take Mr. Cassidy's $40,000 cash deposit to the company's safety deposit box, Marion instead steals it to give to her boyfriend Sam.

Marion checks into the Bates Motel under the name "Marie Samuels." Marie Is short for Marion and Samuels comes from her boyfriend's name, Sam.

Watered down chocolate syrup was used by the crew as blood during the shower scene according to the film's assistant director Hilton A. Green.

Norman places Marion at Cabin #1 because it is close to the front desk and Norman is able to spy on her in the bathroom through a peephole in his parlor.

Hitchcock appears toward the beginning of the film as a man in a cowboy hat talking to someone outside of Marion's work.

Norman hides 'Mother' in the fruit cellar after the murder of private investigator Milton Arbogast.

Frans van Mieris’s "Susanna and the Elders" hides Norman's peephole into the bathroom.

While it is popularly assumed that "Psycho" was the first film to feature a toilet being flushed on screen, that honor goes to 1930's "Going Wild."

Sam and Lila find a piece of paper showing Marion's calculations of what she had spent of the $40,000.

The score used only stringed instruments. Hitchcock initially did not want any music in the shower scene, until Herrmann intervened. The famous score also wasn't nominated for an Academy Award.

According to various sources, a casaba melon was used to create the stabbing sound effect.

Universal produced three sequels to "Psycho," with one being released in 1983, another in 1986 and finally, a television sequel/prequel in 1990.