Ephraim Katz was a film reporter and critic in Israel, before moving to the United States in 1959. He made documentaries for CBS-TV, including The Taste of Sunday, one of its first in color, and later for NBC-TV. He directed many documentaries, educational and industrial films, but his greatest contribution to cinema was his work The Film Encyclopedia (1979).
At the time of his death, Katz was in the process of updating it. He was married to Helen Katz, and the couple had two daughters, Alyssa and Laura.