Howard (Simon Helberg) will receive the biggest news in his life in the upcoming episode of the hit CBS series "The Big Bang Theory."

In "The Valentino Submergence," Star Watch Byline reports that Bernadette (Melissa Rauch) is finally pregnant with their first child. She plans to tell her husband about her condition, but something will happen that will prevent her from sharing the news. When they come home that night, the couple will reportedly discover that an animal has invaded their newly purchased hot tub. A furry rabbit is enjoying a nightly swim when two humans suddenly arrive. When Howard tries to fish it out of the tub, he gets bitten.

Meanwhile, Penny (Kaley Cuoco) and Leonard (Johnny Galecki) will find some time to go out on a date. They are planning to have dinner in a classy restaurant, but the long wait for a table dismays them. They will end up ordering burgers from a takeout joint and eat the food in the car. While the night does not exactly go as planned, the couple will still enjoy their first date since getting married.

Elsewhere, Amy (Mayim Bialik) and Sheldon (Jim Parsons) will also have a sweet time together for Valentine's Day. According to Wikia, Sheldon will decide to try something new with his podcast. The show is originally tagged as "Sheldon Cooper and Dr. Amy Farrah Fowler present Sheldon Cooper's Fun With Flags." Unfortunately, Amy will end up stealing the show, as people calls in to get her advice. Will the night turn up okay for the couple?

Also in the episode, Raj (Kunal Nayyar) will break up with his longtime girlfriend Emily (Laura Spencer) to pursue Claire (Janelle Mara). Emily is heartbroken, but she will have her revenge when Raj finds out Claire already has a boyfriend. When Raj asks Emily to take him back, she will reportedly say no. Will Raj spend Valentine's Day alone?

"The Big Bang Theory" season 9 airs Thursdays at 8 p.m. EST on CBS.