Walter Bishop is a fictional character from the television series Fringe, portrayed by actor John Noble. He is a brilliant but eccentric scientist known for his groundbreaking work in the field of fringe science, which explores the boundaries of conventional science. Walter has a complex personality, often displaying both genius and emotional instability, stemming from his past experiences and personal losses. In the series, Walter is a key member of a special FBI division that investigates unusual and unexplained phenomena. He often collaborates with his son, Peter Bishop, and FBI agent Olivia Dunham to solve cases involving mysterious events and advanced technology. Walter's character adds depth to the show's exploration of science and morality.