Harold Ramis Dan Aykroyd on the screenplay for "Ghostbusters", which became one of the biggest comedy hits of all time, in which he also starred as Dr. Egon Spengler, a role he reprised for the 1989 sequel, "Ghostbusters II" (which he also co-wrote with Aykroyd). His later film "Groundhog Day" has been called his "masterpiece". His films have been noted for attacking "the smugness of institutional life ... with an impish good [will] that is unmistakably American". They are also noted for "Ramis's signature tongue-in-cheek pep talks". Sloppiness and improv were also important aspects of his work. Ramis frequently depicted the qualities
Egon Olsen with the casting, and suggested that he and Byhring switch roles, to which Byhring and the directors fully agreed. Opsahl brought a lot of his comic talents to the role, in particular his doubletakes and long (and at the time profane) rants and outbursts, which Opsahl was known for on stage. He played the role in all fourteen films, including the final film in which he did half his scenes with a prosthetic foot, after having it amputated due to diabetes half-way through production. Egon Olsen Egon Olsen (born 12 March 1925 (DK), 13 March 1923 (NO)) is a fictional