The very first scene of Grey’s Anatomy opens with Meredith Grey waking up next to a very charming, very shirtless stranger. Turns out, he’s not just a one-night stand, he’s her new boss. Cue the sexual tension and the awkward workplace dynamics.

This pilot episode didn’t hold back, and neither did Meredith and Derek, who famously did it on the floor in that opener. It set the tone for what would become one of the hottest hospital dramas on TV. By the end of Season 1, we’d seen enough steamy glances and on-call room antics to know these doctors were doing more than saving lives.