It's been known for quite some time now that Alex Trebek filled in on
Wheel in 1980. He referenced this on the April Fools' Day 1997 episode, and I remember him mentioning it on a TTTT'90 episode where Charlie O'Donnell filled in for Burton Richardson.
Also, someone back in the glory days of a.t.g-s
mentioned that Alex filled in for Pat in either 1985 or 1986.
Out of curiosity, would anyone happen to know anything about either instance? As in, a rough estimate as to the month or at least season when these happened? I'm assuming that in both cases, Chuck and Pat had just fallen ill.