What was the name of the kleptomaniac in Alfred Hitchcock movie?
The title character in Marnie steals money, but apparently only for the thrill of doing so.
What is the name of the movie where Michael caine played the killer whom strangled his victims with a tie?
Lifeboat was an unpublished short story written by Steinbeck. He tried to turn it into a screenplay for Hitchcock, but they couldn't reconcile their different visions of the movie. Steinbeck asked that his name never be released in conjunction to the movie. The story can be read at the John Steinbeck research library. Alas it is not online.
There was no character or actress named "Felicity" in The Girl was Young, a retitled Young and Innocent (1937). A full search of all TV and Movies for Alfred Hitchcock shows only one character with the name "Felicity" (Felicity Sampson) in: "The Alfred Hitchcock Hour" Day of Reckoning Season 1 episode 10 - (1962), played by Dee Hartford.