Following the war, Levitt was the screenwriter for such films as The Boy with Green Hair (1948), Mrs. Mike (1950), and The Barefoot Mailman (1951).

[1] In 1951 he was called before the House Un-American Activities Committee (HUAC) for his communist involvements, and was entered on the Hollywood blacklist.

Their credits included many episodes of television shows such as Bewitched and The Bionic Woman and also the feature films The Misadventures of Merlin Jones (1964) and The Monkey's Uncle (1965).

[3][4][5][6][7] Among the Levitts' activities during the early years of their blacklisting, and corresponding unemployment, was to participate in publishing the journal Hollywood Review.

[9][10] In 1995, Alfred and Helen Levitt were honored with the Morgan Cox Award of the Writers Guild of America.