Humphrey Bogart had been on some anthology series such as Lux Radio Theater but generally disliked the idea of radio. After the tape recorder was developed by the Nazis during the thirties, audio tape technology came to this country and changed the face of radio. Now episodes, whole or in part, could be redone until director and actors were satisfied. Bogie and his wife, Lauren Bacall, could now make a radio series and then be out of the country, if necessary, when it was broadcast, which is exactly what happened. Bogie and Bacall made this one-year series and then left for Africa where Bogie made a little movie called "African Queen".