Cohen also wrote the stories and/or screenplays for at least nine films, co-writing with pal Aben Kandel and sometimes using one pseudonym – either "Ralph Thornton" or "Kenneth Langtry" – between them (Kandel also wrote solo for Cohen on Kid Monk Baroni and, using the Thornton moniker, on Blood of Dracula).
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In the 1960s and 1970s, he began producing horror films in the United Kingdom, working with such stars as Joan Crawford in Berserk! and Trog and Jack Palance in Craze.
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He also discovered young Michael Landon, cast in the lead role for I Was a Teenage Werewolf.
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In the 1950s he started producing films, first working as assistant (and later associate) producer for Jack Broder and Realart Pictures on such films as Bride of the Gorilla, Battles of Chief Pontiac (featuring Lon Chaney, Jr.), Bela Lugosi Meets a Brooklyn Gorilla and Kid Monk Baroni (featuring a 21-year-old Leonard Nimoy as a street kid turned boxer).
In the early 1950s, Ellsworth befriended Hollywood producer Herman Cohen during the filming of Battles of Chief Pontiac. The picture was shot on-location in western South Dakota, using Lakota Indians from a nearby reservation to portray the Native Americans.
Leonard Cohen | Herman Melville | Woody Herman | William Cohen | Herman's Hermits | Mickey Cohen | Sacha Baron Cohen | Herman Wouk | Steve Cohen | Herman Hollerith | Edward S. Herman | Herman Daly | Job Cohen | Herman Van Rompuy | Jem Cohen | George Cohen | Mark B. Cohen | Herman Dune | Herman Brood | Cohen | Simon Baron-Cohen | Lyor Cohen | Herman Willem Daendels | Herman Gorter | Herman Finck | Herman Boerhaave | Herman | Avner Cohen | Stanley Cohen | Herman Wirth |