Karl Alexander was an American writer. Born and raised in Los Angeles, he was the son and nephew of screenwriters—his father, William Tunberg, wrote the screenplay for Old Yeller, and his uncle, Karl Tunberg, wrote the screenplay for Ben-Hur—and worked on a number of films himself.
He was the author of Time After Time, which was adapted into a successful film of the same title in 1979, and several other novels. Jaclyn the Ripper, the sequel toTime After Time, was published in March 2011.
Alexander died on March 30, 2015 in West Los Angeles