Psycho
From Tardis Wiki, the free Doctor Who reference
Psycho was a movie, which had versions in black and white and in colour.
While at Harry Ho's, Rick Pirelli, Scott Beaumont and Thad Steiner argued over which version of Psycho they wanted to watch for Halloween. Rick pushed for the original, while Scott said he'd rather see the colour remake. (PROSE: Forever Autumn)
The seventh time Andy Davidson was murdered, it was in the shower, just like Janet Leigh in Psycho. (PROSE: They Keep Killing Andy)
The title was also used as a popular-culture reference used by Alan Turnpike to indicate someone pretending to have another person in the house by cross-dressing. (PROSE: The Stone House)