In episode 3 of "The Big Bang Theory" season 10, Bernadette (Melissa Rauch) spends a lot of time with Raj (Kunal Nayyar) as she develops regrets about her pregnancy.

In the upcoming episode — entitled "The Dependence Transcendence" — Bernadette draws support from Raj as she begins to feel apprehensive about the baby with Howard (Simon Helberg) preoccupied about the Air Force project.

Sheldon (Jim Parsons) — in an effort to keep his wits about as he works on the project with Leonard (Johnny Galecki) — also showed a different side when he took an energy drink, to everyone's chagrin, Parent Herald reported.

Meanwhile, Bernadette's feelings about the pregnancy will continue to be an issue in episode 4, but more than that, Amy (Mayim Bialik) and Sheldon's relationship are expected to enter a new phase.

The synopsis for the episode entitled "The Cohabitation Experimentation" reads: "After Amy's apartment is flooded, she proposes to Sheldon that they live together as an experiment and he agrees. Howard and Bernadette wonder about knowing the sex of their baby."

In a report by News Everyday, it hinted that Howard and Bernadette will deal with their issues with Howard reassuring Bernadette that it is completely okay for her not be as excited about being pregnant even though it is what everyone expects. Raj still continues to play a big role in the baby drama as he is expected to learn about the baby's gender way before the couple finds out the sex of their unborn child.

As for Sheldon and Amy, fans are expecting some major developments in the couple's relationship with their trial cohabitation. Fans are hoping that this will become a permanent development to move their relationship forward in the same way the other couples in the show have progressed.

"The Big Bang Theory" season 10 episode 4 will air on CBS at 8 p.m. EDT on Monday, Oct. 10.