In the January 10 episode, it will be revealed that detectives Javier Esposito (Jon Huertas) and Lanie Parish (Tamala Jones) have been secretly getting in on for some time!
"We find out it's been going on for about eight weeks, so it's still a new thing," reveals Jon, who had been campaigning hard for the storyline. "Of course we try to hide it from the gang to keep things professional, but it's hard for us to control ourselves."
Sounds like it. The Castle set designers erected a whole new house set for Lanie where the couple will do the deed. And to prepare for his bedroom scenes, Jon has been amping up his cardio workouts. "People are going to be seeing a lot more of me than they've seen — and I'm not just talking about screen time," he says. "For some reason they want us to be naked a lot. With Castle and Beckett not being able to get together, they're relying on our characters to play out the sexual element."
You would think after three seasons of working together, it might be a tad awkward for the co-stars to get naked in front of each other. Not so much. "I was looking forward to it," Jon admits with a playful wink.
Source: TV Guide