CHIN's

Koothrappali is worried people won’t take him seriously in his own field after publishing a paper that suggests he may have discovered alien life. Also, Leonard wants to be the principal investigator on a plasma physics study.

The concept of what it would mean for women everywhere if Amy were to win a Nobel Prize causes Amy to have a meltdown. Also, Koothrappali and Wolowitz try to relive the good old days after Wolowitz buys a scooter that looks like the one he had years ago.

When competitors Pemberton and Campbell charm America on a publicity tour, Sheldon and Amy try to bring Nobel laureates Kip Thorne, George Smoot and Frances Arnold to their side. Also, Halley's fear of the dark leads to opportunity and conflict for Howard, Bernadette and Stuart.

When Penny and Bernadette go to San Diego for a pharmaceutical sales convention, Wolowitz is in charge of the kids. Also, Sheldon finds a book on experimenting on kids, and the guys plus Amy make a day of it.

The gang finds out Wil Wheaton hosts a celebrity Dungeons and Dragons game involving William Shatner, Joe Manganiello, Kareem Abdul-Jabbar and Kevin Smith. Deception and betrayal are the path to make it to the one open seat.

Penny tries to seduce an abstaining Leonard to ruin his "donation" for her ex-boyfriend, Zack, and his wife, Marissa. Also, Wolowitz, Bernadette, Anu and Koothrappali turn Koothrappali's canceled bachelor party into a couple's trip.

After an altercation between Alex, the president's son, and Britain's Prince Henry at a royal event becomes tabloid fodder, their long-running feud now threatens to drive a wedge in U.S./British relations. When the rivals are forced into a staged truce, their icy relationship begins to thaw and the friction between them sparks something deeper than they ever expected.

Jules begins to worry that her marriage to Grayson lacks passion. But when she enlists Ellie to start a verbal firestorm, things quickly get too heated. Laurie helps Travis find his superpower. And Bobby tries to shake things up by taking on a 'cooler' persona.

Passions re-ignite and secrets revealed when a graphic designer reconnects with the great, lost love of his life for a weekend tryst at a house in the desert near Joshua Tree.

The owner of an art museum is killed by what appears to be someone wearing medieval body armor from the 15th century. Can Conan bring the killer to justice?