I've done this many times -- heard a show was pretty good but missed the first couple episodes and thought, "I'm too far behind now, I'll catch up with reruns/on DVD." But I forget about it, or I've already heard all the spoilers, or whatever, so a year or two goes by before I catch a random episode and say, "hey, this is pretty good!" And I wish I'd been watching all along.
Well, now's your chance with The Walking Dead. The Season 1 finale is on Sunday night at 10, but leading up to it, AMC is showing the first five episodes starting at 4:30 p.m. A zombie marathon -- that's an unsettling thought.
So set those DVRs!