The Big Bang Theory: The Cohabitation Experimentation

Last week's uncharacteristically heavy episode of The Big Bang Theory, which focused on the very [...]

Last week's uncharacteristically heavy episode of The Big Bang Theory, which focused on the very pregnant Bernadette worrying about her lack of enthusiasm for having a baby, garnered high-marks with critics and audiences alike.

On tonight's all-new episode, which is titled "The Cohabitation Experimentation," Bernadette wonders if it is weird that she and Howard don't know the baby's gender, but some many people in their lives do. Additionally, when Amy's aparment floods, Penny tells her she can live in Leonard's room, but that might present a problem, as she'll then technically be moving in with Sheldon.

Check out a trio of sneak peeks in the videos above.

When Amy's apartment floods, she proposes a cohabitation experiment with Sheldon. Also, Howard and Bernadette are upset when Koothrappali learns the gender of the baby before they do.

The main cast features Johnny Galecki as Leonard, Jim Parsons as Sheldon, Kaley Cuoco as Penny, Simon Helberg as Wolowitz, Kunal Nayyar as Koothrappali, Mayim Bialik as Amy, and Melissa Rauch as Bernadette.

The episode was directed by Mark Cendrowski, based on a story by Chuck Lorre, Dave Goetsch, and Maria Ferrari, and a screenplay by Steven Molaro, Steve Holland, and Tara Hernandez.

"The Cohabitation Experimentation" episode of The Big Bang Theory airs tonight at 8:00-8:31 PM ET/PT on the CBS Television Network.