Walter Bishop is a research scientist, the Secretary of Defense and founder of Bishop Dynamic in the Alternate Universe, also known as Walternate). He is the true father of Peter Bishop. Walter Bishop of the Prime Universe coins the term Walternate while observing him through the dimensional window. However, they have several key differences in personality: Walternate never suffers from the brain damage his counterpart does, and is thus completely in control of his mental facilities. He is also more ruthless and cruel than his counterpart, with a firm belief that the ends justify the means.