“One Life to Live” fans are in for a treat when “Castle” returns to ABC. Nathan Fillion’s former soap opera co-stars will drop by for a visit, creating a little mini-reunion on the procedural drama. Kassie DePaiva, Darlene Vogel and Tuc Watkins are featured in new pictures from Season 8, episode 10.

As previously reported, DePaiva and Watkins will play Joanna and Roger Mathis, a married couple who end up getting involved with one of Castle (Fillion) and Beckett’s (Stana Katic) cases. “Roger worked as a cameraman for the deceased, while Joanna turns out to be a fan of Castle’s books,” TVLine revealed in November.

Vogel’s role in the episode isn’t clear, but she is listed in a press release as playing Sadie Beakman. The photos above show her with DePaiva and Watkins at some sort of event for Castle’s book.

Fillion was on “One Life to Live” from 1994-1997 as Joey Buchanan. The actor clearly kept in touch with his co-stars, even after ABC canceled the soap in 2013. After DePaiva revealed the “OLTL” reunion on Twitter, Fillion thanked his co-stars for coming on his primetime drama.

While “Castle” is definitely different from a daytime soap opera, it sounds like this episode will be just as dramatic. The Valentine’s Day special, titled “Witness for the Prosecution,” will show Castle as he gets to testify. “Castle finally gets his day in court when he takes the stand as the key witness to a murder from five months ago,” the synopsis reads. “But when new information suddenly arises, he and Beckett must race against the clock to prevent a miscarriage of justice.”

“Castle” Season 8, episode 10 airs Sunday, Feb. 14, at 10 p.m. EST on ABC.