Dusan Brown

Sheldon gets in trouble with Amy when he isn't impressed by her recent accomplishment, and it's up to Penny to teach him how to be a better boyfriend. Howard, meanwhile, must come to grips with Bernadette's dislike of children.

The gang reminisces about what happened during Hurricane Irene and Barney tries desperately to get out of wearing the ducky tie.

When Morgan's sister sees a woman who looks like their presumed-dead cousin, Morgan is confronted with a lie he told his family to provide closure and BAU reopens the case. Shanola Hampton, Chad L.Coleman, Erica Gimpel and Denise Dowse guest star.

Will throws a poker night for his friends, including Andy, Crosby, TJ and Richard, but the event is hijacked by Fiona, who has no problem making herself at home with the guys. Meanwhile, Marcus goes on his first sleepover, but has a hard time staying the night when he finds the others aren't as nice to him as he had hoped.

Marcus is excited for his first ever big birthday party and Will agrees to help plan it. But complications arise when Sam asks Will to a gala at the hospital, creating a scheduling problem. To make matters even worse, Will and Andy discover that one of Marcus's popular classmates is having a birthday bash on the same day. Meanwhile, Fiona and Sam get into a disagreement, and Will finds himself stuck in the middle.