 In Seattle a man named Greg Leiter ( Jim Thorburn ) hallucinates that his boss and coworkers are demons , leading Greg to attack and murder the boss . Greg is hospitalized and falls asleep for sixteen hours ; when Olivia ( Anna Torv ) and Peter ( Joshua Jackson ) interview him in the hospital , he tells them his boss was a demon out of a bad dream before suffering a seizure and having his hair turn white . Walter ( John Noble ) posits that Greg died from " acute exhaustion " . However , believing Seattle to be like the mental institution , Walter desires to go home to Boston and run tests on the corpse from there . 
