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Sheldon and Leonard get invited to a housewarming party at Wil Wheaton's house. Howard gets an out-of-this-world opportunity.

Craving a little motherly love, Sheldon competes with the gang for his mother's attention when she comes to visit.

A cute comic book artist tests Leonard's relationship with Priya, while Sheldon, getting into the Halloween spirit, tries to scare the guys.

Amy is heartbroken when Bernadette and Penny go shopping for wedding dresses without her.

Can friends with benefits still be friends without? Leonard and Penny try hanging out alone, while Sheldon must overcome his fear of birds.

Sheldon becomes jealous and considers taking his relationship with Amy to the next level when Stuart from the comic book store asks her out on a date.

Leonard must face his fears after being contacted by his high school tormentor, while Penny realises that she might have been a bully herself.

Sheldon gets in trouble with Amy, and it's up to Penny to teach him how to be a better boyfriend. Howard deals with Bernadette's dislike of children.

Dara Ó Briain makes sense of world events - kind of - with guests Rhys James, Angela Barnes, Neil Delamere, Ed Byrne, Finlay Christie and Zoe Lyons.

She's an advice columnist writing about how to get a guy to dump her within 10 days. He's a Casanova convinced he can make any girl fall for him.