[1] It was based on the comic strip Mandrake the Magician by Lee Falk and Phil Davis.
"Mandrake the Magician" was originally a three-day-a-week radio serial broadcast on the New York City radio station WOR (AM).
The serial was recorded at the radio studio in New York.
The direction was in hands of Carlo De Angelo, while Henry Souvaine acted as producer.
Just like the comic strip it invoked mystery, adventure and suspense.