2. "Signal 30" (Season 5, Episode 5)
Lane finally blows his English cool and punches out Pete Campbell, a fantasy long shared by practically all Mad Men fans. This episode exposes the private agonies of these men, haunted by the miniature orchestras in their heads. Lane chases his cherished dream of being a real American, and takes it badly when the dream gets crushed. Ken writes science fiction. Pete pines for the Scarlett Johansson-esque high-school girl in his driving class. Roger charms the pants off yet another redhead ("Honey, I won't bore you with compliments") who will never be Joan. And Don sits at the whorehouse bar, drinking his bad memories away.
Joan/Lane watch: She gets up from the couch. She opens the door. She sits back down. What a killer moment.
Best line: "He was caught with chewing gum on his pubis!"—Lane Pryce