"I've lost my hero," his son Jason Reitman said Monday. Ivan Reitman, the beloved director behind comedy classics like "Stripes," "Ghostbusters" and "Twins," died over the weekend. He was 75.

Ivan Reitman’s shoes were large ones to fill. The director all but dominated the 80s movie scene, methodically churning out iconic blockbusters nearly every two years, including Stripes (1981,) ...