Episodes >>> Season 3 >>> 03.08 Doppelganger II

First aired: 18 November 2004

When a homeless woman disappears from a shelter, the team is forced to re-examine the case of twin brothers Greg and Rick Knowles. Five months earlier (Doppelganger), Greg Knowles had confessed to a series of brutal murders, but the team was always convinced that it was Rick who had actually performed the killings. When Greg is released from jail and exonerated of the crimes, the team has to work against the clock to prove that Rick is the guilty party and to save one twin from the other.

Jack is sickened to learn that Rick Knowles -- whom Jack believes pinned his own murders on his currently imprisoned twin brother, Greg, five months prior -- has become a part-time director at the shelter where yet another homeless woman has just disappeared. Though the team investigates Ned, the missing woman’s former boyfriend -- an ex-junkie shelter volunteer with whom she recently had a public altercation -- Jack is convinced that Ned is being framed by Rick. Meanwhile, Jack and Samantha attempt to get Greg to reveal information that may implicate his brother, as the cocky Rick begins to make a case for releasing his brother -- with the ironic argument that the true murderer is clearly still on the loose.

Guest Appearances:
John Cothran Jr. .... Peter Smalley
Jane Fleiss .... Molly Petrovich
Tony Goldwyn .... Greg Knowles/Rick Knowles
Daniel Graves .... Lawyer
John Hayden .... Sheriff (as John Patrick Hayden)
Ana Maria Jomolca .... Cop #1
Roy Lee Jones .... Baggy Pants
Todd Louiso .... Ned Atkins
Peter Macon .... Cop #2
Brian McLaughlin .... Young Rick/Greg
Susan Merson .... Sheila
Claudette Nevins .... Cathy Payton
Bill Smitrovich .... Alexander Olczyk
Sam Vance .... Cop #3
Alberto Vasquez .... Locksmith (uncredited)
Lisa Marie Zaura .... Trisha Payton