The captivating radio series, "Echoes of Mystery," features the dynamic duo of James Monks and Helen Adamson as its lead actors. Their compelling performances breathe life into the captivating characters, immersing listeners in the thrilling narratives. The talented Allyn Edwards, with his rich and commanding voice, masterfully takes on the role of the announcer, setting the stage for each episode's spine-chilling tales. Doc Whipple's exceptional organ playing adds a haunting and atmospheric depth to the program, enhancing the eerie and mysterious ambiance.

The series premiered on WHN in New York City on July 18, 1941, captivating listeners from the start. There is speculation that a different cast may have been involved in a subsequent broadcast of the program, further adding to its mystique.

The air dates of the series varied across different regions. While the eastern coast had the privilege of experiencing the first broadcast on July 18, 1941, listeners on the west coast had to wait until June 8, 1945, to tune in to the thrilling episodes. This flexibility allowed stations to set their own broadcast schedules, ensuring that "Echoes of Mystery" reached a vast audience across the nation.