Futuristic saga spun around two Earthling teens battling aliens---with a little help from a mysterious eccentric and a zany comic-book writer. Zach: Jason James Richter. Bob: Mark Hamill. M.K. Ultra: Gordon Currie. Cara: Melissa Galianos. Commander of Black Berets: Tedd Dillon. Col. Teagarden: Ivan Rogers. Jean Pellerin directed.