Time and sheer volume of work have made James Harper a veteran actor who has seen the business change around him more than once. Everything here starts from 1974. Whatever else appears, drama runs right through the filmography. The filmography runs to some 25 credits between film and television. Of everything on the filmography, 'Armageddon' is the work that traveled the furthest. 'The Insider' is the other credit that tends to come up.