It's amazing to me how well episodes of The Office hold up to repeated viewings. The funny moments are just as funny, and the uncomfortable moments are just as cringe-inducing, as they were the first time around. That notion was brought home to me last night during NBC's Office marathon.

The network decided to air five "HR nightmare" episodes of the show (and one very funny episode of Andy Barker, P.I.), with new wraparounds featuring Toby the HR rep and a few of the secondary characers. All three seasons were represented, including the second episode that ever aired, "Diversity Day." The consistency of the humor from the first, little-watched season to now is pretty remarkable: Michael is inappropriate and uncomfortable, Dwight is an unrepentant suck-up, Pam is sweet with a bit of a snarky streak, and Jim is Jim. But what is really apparent when you look at the three seasons of the show mashed together is how many little things have changed.