This means it's time to haul Darby's mother into the interrogation room. She admits to destroying evidence, but not to killing her daughter. That, she wants to pin on her other daughter. Tommy and Megan don't buy this for a second, at least until Ethan says that the substance he found in the heating vent was for muscle aches and pains, not unlike the ones Darby went to the infirmary for before. She was in direct contact with both the vent and Renee's body, making her the killer.
Tommy calls Megan and sets off to rescue her. Darby figures out that she's been had and jumps from Megan's car, flagging down some conveniently placed uniformed cops and claiming that Megan is the crazy one. Being generic cops, the uniforms don't know who to believe. When Darby seizes the moment and attacks one of them, Megan snags a gun and aims it squarely at her. Things work out okay, though, because the next time we see Darby she's in interrogation, Tommy has the murder weapon, and there's a confession just in time to wrap up the show. An insecure Megan tells Tommy to put the past to rest, although she looks on upset after he's gone.
With only a handful of episodes left in season three, Body of Proof is doing its best to make its case for a fourth run. All the signs of a show on the brink have been here: a significant retooling between cycles, more 'out there' plotlines, the addition of an ongoing mystery surrounding Megan's father's demise. Normally, when you see moves like that, you have cause to worry about a show (see: Fairly Legal and Human Target, two good series that were upended and then didn't last past their next seasons). The funny thing is that unlike ninety percent of other shows in this position, most of the changes on Body of Proof are working out. No offense intended to the previous cast members, but Mark Valley and Elyes Gabel (who's missed in this episode) are strong performers. And while some of the plots this season have been worthy of head-tilting, once you get past whatever it obviously isn't, they're entertaining.
"Committed" is, unfortunately, not one of those episodes. It hits the nail squarely on the head, over and over again. From the moment Megan spots him before the opening title, Dr. Malcolm may as well be wearing a sign that says "suspect" on it. There's absolutely no sublety to his character at all. Likewise for Darby's mother, who is your usual evasive parent with a secret. These characters don't feel like people, but stock parts. The only way they could get more one-dimensional is if they'd actually committed the crimes in question. In turn, circling back around to make Darby the killer falls flat, because the other characters are so obvious you can't help but look for a third option, and she's the only one.
One also has to wonder about the introduction of Riley Dunn, because if she was intended as a rival for Tommy's affections, she's definitely not fulfilling that role. At the end of her first episode, she's agreeing to go out on a date with Tommy, but by the next episode he's having drinks with Megan, and tonight makes it pretty clear that Riley's out of luck. While she'll be in at least one more installment after this, she isn't nor has she ever been a legitimate threat to the obviously intended Megan/Tommy relationship. There's nothing wrong with Marisa Ramirez as an actress, and it might be interesting to have her stick around as a recurring cop character (like, say, Profaci on Law & Order), but the love triangle idea has failed.
Body of Proof is off next week, so we'll see you in two weeks for a plane crash. It's still not boring in Philadelphia.