The rewards of paying attention

Last night we watched "At Bertram's Hotel", the latest Miss Marple episode of PBS's Mystery! Early on, during a busy scene in the hotel lobby, the manager, while trying to field multiple requests as near to simultaneously as possible, says into the phone, "No, I'm sorry, Miss Otis regrets, she's unable to lunch today."

No character named Miss Otis ever appears, so this was clearly just thrown in for the fun of it.