As the new Greendale Subway shop opens in the cafeteria, Shirley, Pierce and Britta plot to bring about its early demise. Vice Dean Laybourne makes another attempt to get Troy to join the Air Conditioning Repair Annex, while Abed and Troy find themselves at odds over their competing pillow and blanket forts.

Dave welcomes actor/comedian Tracy Morgan, sportscaster Jim Rome, and a performance from the Broadway musical “Once.”

The Machine's latest number presents a unique challenge for Reese and Finch since the person has virtually no digital footprint - and appears to be leading a double life.

Penny buys Leonard and Sheldon “Star Trek” collectibles as a thank-you, leading Sheldon to be haunted by Mr. Spock. Meanwhile, Raj decides he has met the “Future Mrs. Koothrappali” after his parents set him up on a date.

Stephen involves college students with Colbert Super PAC, Mitt Romney tries comedy, and Peter Beinart discusses Israel.

While investigating the murder of a casino employee, Jane runs into a stage magician he used to tour with during his time as a mentalist and discovers he is hiding a shocking secret.

Damon and Stefan focus a new project that will bring them closer to destroying Klaus, and they quickly bring Elena, Caroline and Matt in on the plan. After Klaus threatens someone close to Bonnie, she has no choice but to work on the spell he needs. Meanwhile, Klaus and Rebekah find the perfect motivator to convince Finn to cooperate with them, but Rebekah is more interested in her own brutal plan to take revenge on Damon. Stefan’s emotional turmoil leads him to a dangerous confrontation with Klaus and, later, to a heartbreaking moment with Elena.