Moon Landing
Claire feels slightly inadequate when her old friend, Valerie, visits and is nothing like Claire remembered. Meanwhile Jay has an unsettling locker room moment when he and Cameron go play racquetball, and Mitchell tries to help Gloria with some legal problems
The Thespian Catalyst
Hoping it will make him a better teacher, Sheldon has Penny give him acting lessons. Raj has fantasies about a friend's girlfriend.
The Einstein Approximation
Sheldon's search for the answer to a physics problem leads him to work at the Cheesecake Factory with Penny.
The Financial Permeability
Sheldon's solution to Penny's financial difficulty leads to a confrontation between Leonard and Penny's ex-boyfriend.
The Nerdvana Annihilation
When delivery of another collectible leads to Penny's lashing out at Leonard, he decides it's time to give up his habit, much to his friends' protestation.
Bottomless Pit!
While Stan, Dipper, Mabel and Soos are falling in a bottomless pit, they tell stories to pass the time.
Protection
Nancy has another full week of trouble to deal with and Doug isn't helping. Heylia teaches Celia.