CHIN's

What starts out as a lazy day soon takes an exciting turn when an antique collector meets his end by the edge of an ancient sword. Can Conan cut through all the confusion?

As a joke, Sheldon and Penny try an experiment designed to make participants fall in love. Meanwhile, Leonard, Amy, Raj and Emily spend the evening trying to escape a room with a “zombie.” And, after returning from Mrs. Wolowitz’ funeral, Bernadette and Howard run into trouble at the airport.

While Kat deals with the blowback from her big relationship change, she leans on Nick to help her bounce back. Meanwhile, Randi deals with Carter’s newfound presence in her apartment.

Claire does some online snooping that causes drama with the rest of the family.

Cameron is in charge of the school’s big spring dance, but when a popular teacher returns from sabbatical, a bit of not-so-friendly competition blooms. And with Claire on chaperone duty at the dance, Phil gets Haley to accompany him to his annual realtor’s banquet and is looking forward to impressing his little girl. Elsewhere, Mitch starts a new job and can’t seem to get a good read on the new boss or the work environment. Jay and Gloria babysit Lily and an accident with Gloria’s purse ignites a case of whodunit and it’s Lily’s word against baby Joe’s.

Things get awkward when Phil shows up at Claire's college reunion. Jay is fixated on winning a big bowling tournament. A wig malfunction during an elaborate photo shoot with Joe leads to unfortunate results.

It's a day of disturbing realizations when Mitchell manages to ruin one of Jay's proudest golf moments, Phil overhears something that may forever change how he sees his little girl, and Gloria stumbles upon Claire's dangerous little secret.