Massive Dynamic executive Mark Young ( Ptolemy Slocum ) deliver a presentation at the company ’ s Manhattan office . When he is done and the other attendees have left , he see an unusual butterfly . Upon picking it up , he experience a cut on his hand and is then attacked by a swarm . Mark jump out of a window , to his death . Olivia Dunham ( Anna Torv ) , despite preparing to go out to dinner with her sister , instead agree to Phillip Broyles ' ( Lance Reddick ) demand that she join the Fringe team 's investigation at the scene . While examining the body , Dr. Walter Bishop ( John Noble ) see lacerations on Young ’ s skin and note a lack of corresponding tears on his shirt . At the scene , Olivia have a brief vision of her deceased lover John Scott ( Mark Valley ) watching them , which trouble her .