Who is Bernard Fox? you ask...
You may not remember his name, but I'm sure you've seen him...
He was Dr. Bombay on Bewitched:

And Colonel Crittendon on Hogan's Heroes:
If anyone had asked me, I'd have said, "Oh, that guy must have died years ago", but nay nay, he's still alive:
http://en.wikipedia.org/wiki/Bernard_Fox_%28actor%29Bernard Fox (born Bernard Lawson 11 May 1927) is a retired British film and television actor from Wales, whose best remembered roles are Dr. Bombay from Bewitched, and the naive, bumbling Colonel Crittendon on Hogan's Heroes.
So here's what's likely to be a very short APT, (since if you already believe they are dead, you're not likely to think of them...)
What person or persons have you long assumed to be deceased that you recently discovered actually weren't dead?