New info has surfaced on the CBS hit sitcom, The Big Bang Theory, as there are indications that the creative brass are in the process of delving deeper into the romances of the cast for its Valentine's Day episode

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According to TV Guide on Jan. 20, the program's upcoming Valentine's Day installment will feature "a significant moment for Sheldon (Jim Parsons) and Amy (Mayim Bialik)."

Bialik spoke to the site about the romantic episode, and how it pertains to Amy and Sheldon's relationship.

"It is a very big, very sweet episode for Amy and Sheldon," she says.

The installment is said to have the couple embark on a train ride through Napa Valley along with Howard (Simon Helberg) and Bernadette.

Helberg dished about Howard's fascination with train's as well as the ending of the episode.

"[Sheldon is] obsessed with the train's mechanics. But there are some major steps forward taken, with a pretty beautiful ending," he said.

Next up for CBS' The Big Bang Theory will be its The Convention Conundrum episode, which will air on Thursday, Jan. 30. It's Valentine's Day installment will come out the following week on Feb. 6. Be sure to keep checking back with Enstars for more of the latest info on the show.