Decoder Ring Theatre!
I recently did a talk at Norman Galaxy of Writers, a writing group that's 45 years old this month.
One of the members was kind enough to send me a link to Decoder Ring Theatre. I've listened to a couple of the episodes, including the Red Panda and Black Jack Justice.
The dialogue is snappy and the action is fast-paced. The Red Panda has its roots in The Shadow and Doc Savage pulps.
You can find more information about the Red Panda here.
And you can find two novels on Amazon.
I'm downloading some of these to put on my iPod. Great fun!