John Prosky

Izzie seems to be getting over Alex when she shares an undeniable chemistry with Denny Duquette, a patient who's awaiting a heart transplant, and George treats Bex, a young teen hermaphrodite.

Dr. House shows special interest in a schizophrenic with deep-vein thrombosis and her teenage son, who is her primary caregiver.

When Allison learns why her mother-in-law has come to visit, she struggles not to discuss it with Joe; an arson-related murder brings Allison, Devalos and Detective Lee Scanlon together in an unexpected manner.

While struggling to keep her mother-in-law's secret from Joe, Allison tries to find the link between her dreams of a dentist's violent assault on a prostitute, Devalos' arson case, and Ariel's prediction of the death of her classmate's mom.

Allison's attempt to ease a couple's concerns that their house is haunted leads to murder; Joe discovers the truth behind Meghan Doyle's plans for his invention and their joint venture; the district attorney's race takes an unexpected turn.

A venture capitalist likes Joe's invention; agent Edward Cooper tries to convince Allison that he is back in town only to find a serial killer, but her dreams tell a different story.