The September 1934 issue of Doc Savage Magazine offered an action-packed tale called Fear Cay, which in addition to being a solid pulp adventure also featured the second appearance of Doc’s gorgeous and daring young cousin, Patricia. (I recently reread the tale as I got into the right mood to write the next Doc Wilde novel for Putnam).
In 1985, NPR produced serialized radio plays based on two of the Doc Savage novels, The Thousand-Headed Man and Fear Cay (which they renamed Fear Key, assuming, I guess, that people these days are too stupid to figure out what a “cay” is). These radio plays were very well done and a lot of fun, and are really tough to get hold of these days.
The web radio show Earth-2.net’s most recent podcast features the first two chapters of Fear Key. If you’re a fan of the Man of Bronze, or curious about him and his adventures, it’s worth a listen. Hopefully they’ll be running the remaining five chapters, but if they don’t, I think I have them on some hard drive somewhere and I’ll post them if anyone wants.