3. 'Girls': Hannah and Adam (Season 1, Episode 8)
Just when the grinding desolation of Hannah and Adam's off-putting relationship on Girls seemed like too much to bear (the series pilot, the lunchbox fantasy, doing it "for the story"), it . . . just got better. Pulling an epic switcheroo after repeatedly hammering home the bleakness of their bone zoning, Hannah and Adam finally figure out that they are two weirdos meant for each other and get down to some quality business. The abrupt change in tone made this hook-up the most surprising moment of Season One. Forcing a newly single Marnie to hear her roommate orgasm through the walls only made it that much sweeter.