'The Big Bang Theory' season 10 episode 12 spoilers, news: Penny and Leonard's marriage on the rocks?

Penny (Kaley Cuoco) and Leonard (Johnny Galecki) might be entering the rocky stages of their marriage. Meanwhile, Raj's (Kunal Nayyar) exes will be appearing soon in the second half of season 10.

In the upcoming episode 12 of "The Big Bang Theory" season 10 titled "The Romance Recalibration," Penny and Leonard might start having marital problems.

According to the episode synopsis posted on the show's fan site, "Penny thinks that Leonard takes her for granted so she takes Amy (Mayim Bialik) on her spa weekend instead of Leonard."

Penny and Leonard were the first ones to get married from the group, and it seems like they are already headed towards the rocky part of marriage. But based on the title "Romance Recalibration," it is possible that Leonard finds a way to rekindle the romantic flame of their relationship.

Meanwhile, Raj might be having déjà vu because two of his exes — Emily (Laura Spencer) and Claire (Alessandra Torresani) — will pop up in his life this season 10.

TV Line reports that there will be no reconciliation of relationships between Raj and either fo the two women, but showrunner Steve Molaro shared, "We are talking about an idea that would involve both of them."

Maybe the two will gang up on Raj for dating the both of them at the same time. But Raj might not pay too much attention to them now that Halley Wolowitz is now in the picture.

Molaro shared in an interview with The Hollywood Reporter that Halley's arrival will affect her parents — Howard (Simon Helberg) and Bernadette (Melissa Rauch) — the most. Halley will have an impact on the other members of the group that new storylines will be opened up for them.

Howie and Bernie are having a difficult time adjusting to Halley's arrival, and their friends — especially Raj and Stuart (Kevin Sussman) — are willing to help take care of the baby.

Since Penny and Leonard are going further into their marriage, maybe Halley will make them consider having their first child as well.

"The Big Bang Theory" season 10 airs every Thursday at 8 p.m. EST on CBS.