In the first part of the one-hour seventh season premiere, Sheldon and Penny bond in Leonard's absence, but it's Sheldon's feelings that are crushed when Leonard returns from the North Sea. Guest star Regina King returns as Mrs. Davis, the University's Director of Employee Relations.
When Jesse McCartney stays at the Tipton, Maddie, London, and Zack try to sneak into his room while Cody turns to Arwin for help with his science project.
Cody is ecstatic because he's now the favorite to win the Boston Spelling Bee. But after Zack borrows money from Cody's toughest competitor and has not way of paying him back, Zack is forced to ask Cody to throw the competition so competitor will forgive his brother's debts.
Cody's been tapped to be the editor-in-chief for the school newspaper, so Zack asks for a position.
The boys open a nightclub at the Tipton, and London tests out salon products on Maddie.