Jess meets Sam's (guest star David Walton) female best friend, Diane (guest star Caitlin Fitzgerald). Meanwhile, Nick is worried Gavin (guest star Peter Gallagher) will disappoint Schmidt (Max Greenfield) again and Winston is offended by a reaction to a birthday gift.

Schmidt makes a last ditch effort to convince Cece's mom (guest star Anna George) to come to their wedding, but in doing so, he might miss the special day himself.