Remember when they aired "The Dick Cavett Show" on TMC last year, and they showed Hitchcock reminiscing about a practical joke in which he threw a party and had an actress come and play an elegant, older woman and then told the guests he had no idea who she was?
I was reading "Alfred Hitchcock Interviews" and found a fuller account of the joke.
Hitchcock rented the room at the restaurant and had the actress show up. One of the invited guests, apparently some big shot agent, came with his wife, who was invited, and with his house guest, who was not invited but insisted that the house guest be part of the party.
Everybody was baffled about the old woman, who insisted that she had been invited, but Hitch told everyone that he had no idea who she was.
So they started to eat, and halfway through the meal, a screenwriter bangs his fist on the table and declares "It's a gag!" pointing at the old woman. Then he points at the uninvited houseguest and says: "You're another gag!"
I wonder if the writer ever worked in Hollywood again.

