David Litt

The socially stunted guys are nervous when Penny invites them to a party she's hosting. Also available on iTunes

TBS Presents: "Luminous Fish Effect, The" Sheldon's getting fired forces him to explore what life has to offer outside physics, leaving Leonard to take drastic action to snap his friend out of his funk. Also available on Amazon Instant Video and iTunes

Oliver finds himself in a relationship with an incredibly annoying woman just to show Ben that he isn't entirely shallow when it comes to relationships, while Ben gets involved with a woman whose only contribution to the relationship is sex. Also available on Amazon Instant Video

Ben gets into trouble when he attempts to please Stewart by befriending Crystal. He recruits his reluctant siblings to have dinner with the new couple, only to be discovered there by Lydia, who fears she is being replaced. Also available on Amazon Instant Video