Michael Trucco knows a thing or two about being "that guy" in a TV love triangle.Katee Sackhoff ) and Lee "Apollo" Adama (Jamie Bamber) on Battlestar Galactica. Now on Castle, Trucco plays Detective Tom Demming, an increasingly powerful wedge between Rick Castle (Nathan Fillion) and Detective Beckett (Stana Katic).But Trucco tells TVGuide.com there's more to his role on Castle than creating another obstacle to a Castle-Beckett pairing. "It's an interesting plot device to enter in a third wheel — it always helps raise the stakes for all parties involved. But often, those characters can be one-dimensional," Trucco says. "What I like about Demming is he's actually a good guy. There's some sincerity in this character and I think he's genuine in his feelings for Beckett."He checks with Castle first," Trucco continues, recalling one of his character's first scenes. "It's a guy thing. He just wanted to make sure he's not poaching or intruding on anybody's territory. I thought that was indicative of the character. I like that there's nothing subversive. It's always fun to play that guy, but there's something inherently challenging in trying to find the humanity in a character and bring a reality to it."Facing Kate with Sarah Shahi, he says his character's ending is left open and that he'd be "more than game" to return next season. For the time being, though, he's just worried about how fans will react to the season finale."It's a precarious perch that I sit on," Trucco says with a laugh. "These are die-hard fans and they take this stuff very personally. I want to be embraced by the audience, but it's fun to stir up the pot."
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