Mark Valley Mark Valley

When Body of Proof returns to ABC this fall, it's going to look a lot more like Castle and Bones, and the proof is in the casting. Sources are telling me that Human Target, Fringe and Boston Legal hottie Mark Valley, fresh off his gig on NBC's cancelled Harry's Law, is in discussions to play Detective Tommy Sullivan, a new will-they-or-won't they sparing partner for series star Dana Delany's Dr. Megan Hunt.

Delany tells me Tommy "is this guy who broke my heart 20 years ago. He turns up on the police force in Philadelphia working with me." Not beating around the bush, the actress confirms they're going for a "Castle/Moonlighting kind of thing."

Valley tested with Delany last week and the actress loved their chemistry. Should he win the role, this would be a TV reunion for the stars. Back in 2001, the two co-starred in the short-lived primetime soap Pasadena, which coincidentally also starred Delany's Desperate Housewives hubby, Nathan Fillion. Says Delany: "I hope it works out." Not just because she loves Valley, but because, "this could make Body of Proof a two-person show to give me a day off once in a while."

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