Dennis Hopper, 74, has died of prostate cancer.

While generally thought of as a straight character actor, he had a surprisingly large number of genre credits, including 1960s TV appearances on The Twilight Zone and The Time Tunnel. In SF films, he's probably best known for his very good performance in the very, very very bad "Waterworld." He was also in "Super Mario Brothers," "Firestarter 2," and "My Science Project."