While Barney prepares for his wedding to a mystery bride, he and Ted reminisce about Punchy's wedding, including when Marshall and Lily announced they are having a baby. Meanwhile, Robin considers telling Barney she has feelings for him.

How Sex Works is a documentary series which uses CGI as the series takes a look at the physiological, neurological and psychological changes that happen before, during and after sex.

In the second-season premiere, Ben and Cam look for a way to market their CRISP attire in New York after a promising debut in Tokyo. Meanwhile, Rene's new Rasta Monsta billboard is a hit with everyone except his girlfriend; and Rachel returns from a soul-searching trip abroad, but she's still not over Ben...