Bill Bixby and Lou Ferrigno as David Banner/The Hulk in THE INCREDIBLE HULK, THE INCREDIBLE HULK: DEATH IN THE FAMILY, THE INCREDIBLE HULK RETURNS, TRIAL OF THE INCREDIBLE HULK and DEATH OF THE INCREDIBLE HULK. That's five. TV movies, granted, but movies nonetheless.  I think the first one (the pilot for the TV show) made theatres outside the US.