Melissa Rauch

The gang is excited about a new screening of 'Indiana Jones and Raiders of the Lost Ark' because there are 21 seconds of additional footage being seen for the first time.

Leonard realizes he's the only one without a girlfriend, while Sheldon wants to get rid of his.

An embarrassing secret of Wolowitz's is revealed; Raj and Sheldon get into a war at work.

Sheldon and Amy experiment on their friends by spreading gossip, while Howard takes a big step in his relationship with Bernadette.

Penny feels left out when Bernadette shows an interest in science and asks Sheldon to teach her about science. Eventually, she surprises everyone with what she's learned.

When Penny's dad comes to visit, Leonard discovers that she told her parents they were back together because they always had a soft spot for him.