After WWII, he became a playwright and theatrical producer/director, producing over 300 plays and directing over 100.
(1934) Comic strip: Created "Mandrake the Magician" comic strip. Until his death in 1999, it was one of the two longest-running comic strips in the world still made by its creator. The other was "The Phantom", also Falk's creation. NOTE: Filmed as Mandrake (1979).
(1940) Radio: Wrote source material (comic strip) for the syndicated radio series "Mandrake the Magician".
(1936) Comic strip: Created "The Phantom" comic strip. Until his death in 1999, it was one of the two longest-running comic strips in the world still made by its creator. The other was "Mandrake the Magician", also Falk's creation. NOTE: Filmed as The Phantom (1943), The Phantom (1996), The Phantom (1961)