Michael Shayne, Private Detective (1944-1948) was the inaugural iteration of the series, with Wally Maher lending his voice to the character of Michael Shayne....
Terry and the Pirates was an American radio serial adapted from the comic strip of the same name created in 1934 by Milton Caniff....
Ah, it seems like episode 54, "Tales of Headless Warriors," is taking "The Black Flame of the Amazon" into the realm of the supernatural...