The first time It's the Great Pumpkin, Charlie Brown aired on television, it preempted My Three Sons. As in, an original episode of My Three Sons. The date was October 27, 1966, and Douglas family fans had just seen Yvonne Craig play a meter maid the previous week. Instead, CBS viewers got the Peanuts crew. The idea of a Peanuts holiday special, and a Peanuts cartoon in general, was still relatively novel. Great Pumpkin was just the third animated special from the mind of Charles Schulz. A Charlie Brown Christmas has premiered one year earlier. The Christmas special was so...