Supernatural -- "What's Up Tiger Mommy?" -- Pictured: Misha Collins as Castiel -- Credit: Diyah Pera/The CW -- © 2012 The CW Network. All Rights Reserved.
Sam (Jared Padalecki) and Dean (Jensen Ackles) investigate a string of unusual murders where the victims were all recipients of organs from the same donor. The killer is captured, but things become even more complicated when the brothers find their killer in a trance mumbling an ancient prayer.