Okay, this will be the unscientific test of the old aphorism that celebrity deaths happen in threes. Friday, Don Knotts; Saturday; Darren McGavin; if another significant death occurs in the next twenty-four hours (hey, I didn't establish the time frame—fate did, with the one-day gap 'twixt Knotts & McGavin!), then I'll give this whole "bad things happen in threes" theory a bit more respect.
The count is on. Personally, I hope that it's a bust... I'd much rather prove truisms wrong than lose another celebrity whose work I've enjoyed. (Oh, yeah, that's the other unscientific requirement: it has to be someone that I perceive as a significant celebrity. So if, say, M&M or Whitney Houston or Dan Rather pass away, it's sad but meaningless for this survey, since they've given me not one iota's worth of enjoyment during their careers...)