Family Plot (1976)

Themes:
Based on novel, Blonde, Disguise, Stairs, Chase, Anti-Marriage comments, Food (Hamburger), Telephone

Characters:
Blanche
George
Arthur (Eddie Shoebridge)
Fran
Julia Rainbird

Notes:
Hitchcock's last film
Excluding the backstory about the Eddie Shoebridge murdering his parents, there is no murder in this film. Mahoney dies in a car accident though.
Apothequms: "You're as psychic as dry salami"
Use of disguises (Fran's blonde disguise)
Lighting - flashlight

Ending is quite different - Blance winking at the audience at the end.