CHIN's

Yingluo gets help from Fu Heng to secretly investigate and find the truth about her sister killer, While the Empresses is away, Yugui suddenly goes into labor and shocks everyone in the Changchun Palace. Consort Gao demands immediate action on a gravely important matter.

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.

Kat rents her apartment to Kelly and Shrub from Flatch, Ohio; Max plans to play one of his original songs for Robin Thicke at a local fundraiser.

It’s male-bonding day when Jay takes Luke into the garage to show him the way around tools and impart some manly wisdom, and Gloria goes with Claire and Lily to shop for Lily’s flower girl dress. Elsewhere, Mitch, Cam, Alex and Manny go for a cultured day at the museum but it eventually becomes survival of the smartest. And Phil enthusiastically offers to help Andy with his anniversary gift to his girlfriend, which is an elaborate video expression of his love.

Mitch and Cam's friend Sal announces she's getting married the next day and they are in the wedding; Gloria doesn't trust her new nanny; Claire bonds with Haley; Phil helps Luke with a girl.

Mitchell feels pressured to make Cameron's birthday extra special. People start to question Jay's manliness, and the girls interfere with Phil's leap day plans.

Claire runs herself ragged trying to fix the relationship between Haley and Alex, while Phil sneaks off to the spa. Meanwhile, Gloria is horrified by Jay's morbid plans to purchase two side-by-side crypts in preparation of their death, and Cameron decides he wants to write a book that celebrates the fact that Lily is adopted, but soon learns something new.