разная инфа про Белла и Бишопа
It is revealed that Bell and Walter were close friends in their youth, sharing their lab, as well as their dreams of scientific explorations. In the beginning of the 1980s, they came to conduct a series of experiments on children (including a young Olivia Dunham), using a drug called Cortexiphan. They eventually came to part ways, with Bell creating Massive Dynamic, and Walter continuing his experiments, which eventually had him institutionalized.
Not much is revealed about the parallel universe version of Bell, only that he and the alternate version of Walter never had the chance to meet, because the young William was killed in a car accident. This resulted in changes, such as Massive Dynamic never being founded in the second world.
en.wikipedia.org/wiki/List_of_Fringe_characters...
Walter Bishop is a former government researcher into fringe science with a recorded I.Q. of 196. He was institutionalized after a lab accident which resulted in manslaughter charges.
Born in Cambridge in 1946, Walter attended Harvard University as an undergraduate, conducted postgraduate study at Oxford University, and received his Ph.D. from the Massachusetts Institute of Technology (MIT). It was revealed on the episode "The Bishop Revival" that his father, Dr. Robert Bischoff (anglicized to Bishop in 1943), was a spy for the allies in Nazi Germany. In "The Arrival" we learn that Dr. Robert Bischoff died young for reasons yet unknown. From the 1970s until the late 1980s/early 90s, Walter operated from a basement laboratory situated under a building in Harvard University. He conducted experiments with his partner William Bell and several assistants. After an accident in 1991 which resulted in the death of at least one of these assistants, and amid accusations that he was using humans as guinea-pigs for his experiments, Walter was charged with manslaughter.
en.wikipedia.org/wiki/Walter_Bishop_(Fringe)