Bobby D

Detective Robert Dershowitz (it's a long story, apparently), or Bobby D as he prefers to be called (Todd Williams), is a homicide detective who's frequently assigned to cases involving Mary's witnesses. He's pretty sure he's got Mary's number—that she's a U.S. Marshal working for WITSEC—and doesn't hide his disgust for the branch of law enforcement that puts known criminals back on the street.

As confounding as it is for him that Mary will neither confirm nor deny her role or the true identities of the homicide victims no matter how many times he asks, he can't help but be attracted to her—or at least, let her play him, even though he is well aware that she only gives him the time of day when she needs something.