a car accident; as a result, Massive Dynamic in the parallel dimension was never formed, instead there is only Bishop Dynamic. In season three, Walter remembers that William had an idea of developing "soul magnets", devices that would channel the energy from a dead body into another entity. Walter figures that William must have created a soul magnet for himself and figures that the trigger is the frequency created by the bell William left for Nina. Walter rings it and William's consciousness appears in Olivia. "Bellivia" explains that he put the soul magnets in Olivia's tea when they first met in the other universe. Broyles gives William 48 hours to find a new viable host for him and get out of Olivia's body, but William takes his time as he knows that no harm is coming to Olivia. However, not too long after, Olivia regains control of her body briefly, confused and in a trance before William takes back over. William then explains that there is something more complicated than he expected. Walter and Peter journey into Olivia's consciousness and find William in order to recover Olivia before she is "lost". After Walter and Peter "die" within her mind, William aids Olivia in escaping until she is able to confront her own fears, enabling her to take back control of her body. William tells Olivia to pass on the message "I knew the dog wouldn't hunt" to Walter. He then departs from Olivia's consciousness. As Olivia wakes up, Astrid and Walter realise that William's plan to transfer his own consciousness into a computer has failed. Olivia relays William's message to Walter, who explains that the message was a phrase William would use in earlier experiments when he knew that they would not be successful, and that his reason for suggesting it was because "William hates goodbyes". In the fourth season, it is noted by Nina and Walter that Bell is dead, having, in the new timeline, committed suicide in a car accident in 2005 to end his suffering from lymphoma. Disbelieving Nina, Walter returns to St. Claire's Mental Institution and finds the scent of Bell in one of the log books that dated back to when Walter believed he had visited, and continues to assert this claim. After sending David Robert Jones to his demise, he kidnaps Walter, who has deduced that he is alive, and takes him onto his