I was wondering about myself. In the '70s, anything that was pre-empted would air the next day, so nothing was skipped. This is why Match Game and Tattletales frequently changed celebrity panels in mid-week. By the mid-80s, I'm not sure CBS was still doing that. I don't think a show like $25,000 Pyramid ever straddled weeks, and I'm sure it must have been pre-empted a few times.