Walter thinks the abduction of a young music prodigy is linked back to his old bunkmate at St. Claire's Hospital. When he kidnaps the child he see's a sequence of flashing lights. Olivia wants Walter to return to the mental institution much to Peter's outcry, but Walter's determination to help ends up having chilling ramifications.
Elenco: Anna Torv , Jasika Nicole , Joshua Jackson , John Noble , Mark Valley , Blair Brown , Georgina Haig , Kirk Acevedo , Lance Reddick , Michael Cerveris , Seth Gabel .