The George Burns and Gracie Allen Show: S2 E4, Surprise Birthday Party
Aired: 11/8/1951. It's Harry's birthday, and when the people at work call to tell Blanche about their plans for a surprise party, Gracie is at the house and she picks up the phone instead. Thinking Gracie is Blanche, the man on the phone, Charlie, tells Gracie that he is planning a surprise party for her husband. She thinks that the party is for George even though it is Harry's birthday. Meanwhile Harry thinks that everyone has forgotten about his birthday, and George can't figure out who would be throwing him a party.