sentences:  "Seinfeld" regular John O'Hurley had auditioned for several roles on the show but Carter had not previously thought of him as "an "X-Files" actor".For the part of Dr. Pollidori, however, Carter considered him "the absolute perfect casting choice".Stewart Gale, who portrayed Izzy Berkowitz, was a non-actor who Carter saw "literally on the street one day" sitting in a car.