: Leonard attempts to adopt a "confident" persona to pick up the agent, failing spectacularly and making a fool of himself.

: This was Kaley Cuoco’s first appearance after a two-episode absence. To hide her real-life broken leg, she was filmed strictly behind the bar or sitting at a table.

: Appears as himself. In a classic Sheldon moment, the physicist is berated for his role in demoting Pluto to a dwarf planet.

When traditional apologies fail, Sheldon makes the ultimate sacrifice: he offers Howard his . Realizing the depth of this gesture, Howard finally accepts the apology—though the truce lasts only 94 seconds before Sheldon demands his seat back. Notable Guest Stars & Trivia