Howard's mother has a say when he and Bernadette host Thanksgiving dinner for the gang. ..More

Now just friends, Sheldon and Amy spend Thanksgiving at the aquarium; a reluctant Wolowitz volunteers at a soup kitchen with Bernadette, Raj and Emily; and Penny realizes that Leonard knows a bit more about her than he's let on. ..More

Sheldon is working overtime and pushing himself when he collaborates on projects with Leonard and Howard, and another one with Amy, all on the same day. Bernadette's maternity leave is running out and she must face going back to work. ..More

Leaving baby Halley in day care proves to be tough for Bernadette after she starts back to work; and geologist Bert digs up a girlfriend, but some of his colleagues think she's a golddigger. ..More

Penny's job offer from a former boyfriend doesn't sit well with Leonard. ..More

Leonard, Sheldon and Wolowitz celebrate the successful completion of their top-secret military project, until an unpleasant surprise leaves their heads spinning. Amy considers an offer of a summer position as a visiting researcher. ..More