Alan makes wedding plans for Evelyn and Teddy, while Charlie figures out how to get more acquainted with his future step-sister, Courtney.
When the delivery of a full-size prop of 1960's The Time Machine makes Penny miss work, she scolds Leonard about his sci-fi collectibles. He decides it's time to give up such childish pursuits.
When Don decides to promote Jack and make him his successor over Devon, Jack decides to give his old job to Liz because she always has his back. However, a turn of events concerning Don's health compromises Jack's promotion. Meanwhile, Tracy thinks that his son is embarrassed of his career ...
Alan feels Charlie is unable to control his womanizing ways.
Sheldon finds himself booted from the gang's Physics Bowl team and replaced with Leslie, so he forms his own team, hoping to prove he's superior.
Dennis becomes a New York City celebrity after jumping in front of a subway and saving someone who fell on the tracks. Meanwhile, Jack desperately tries to persuade Tracy to become the celebrity face of the Republican Party, and Kenneth meets old-time TV legend Bucky Bright, who doesn't quite match ...
Charlie double-dates with Jake and fixes Alan up with a hooker.
With Sheldon rattled and impossible to be around after meeting Dennis, a 15-year-old physicist who's smarter than he, the rest of the guys search for a way to eliminate the threat.
When someone on the TGS staff insults Jack in a newspaper article about the season finale of MILF Island, he frantically sends Jonathan to interrogate everyone until the mole is found.
