There was a 1942 serial called Captain Midnight and it had 15 chapters. It's based on the radio show, which I haven't heard. In the serial Dave O'Brien is Captain Midnight. Here's the description of the serial from the Wikipedia.
Captain Midnight was only one of the many aviation serials released in wartime whose leading characters were derived from early pulp magazines and radio favorites. In this serial, Captain Albright is an extremely skilled aviator better known as Captain Midnight, who is assigned to neutralize the sinister Ivan Shark, an evil enemy scientist who is bombing major American cities. Our hero leads the Secret Squadron, whose staff includes Chuck Ramsay who is Midnight's ward and Ichabod 'Icky' Mudd, the Squadron's chief mechanic. Shark has developed a highly efficient mercenary organization, being aided by his daughter Fury who is highly intelligent and second in command, Gardo the henchman and Fang, an Oriental ally. Unfortunately, Shark is after a new range finder invented by the altruistic scientist, John Edwards, whose beautiful daughter, Joyce, the villains attempt to capture to blackmail the inventor.
It's about as good as most serials. I liked it but I doubt I would get back to it. There are plenty more serials out there and some are a bit better. Plus there's a whole bunch I haven't seen yet.
There was a Captain Midnight TV series that had 39 episodes. I've only glimpsed a bit of it. I downloaded the lot from YouTube and will watch them in the future. Maybe. Who knows.
Richard Webb plays Captain Midnight. He had a career that started in 1942 and lasted until 1977. You've probably seen him in something, especially if you watch a lot of TV and movies from the time he was working. I know I do and I've seen him in a bunch of stuff over the years. Some of it, like Perry Mason, I'm revisiting again.
Sid Melton play Ichabod 'Ikky' Mudd and Olan Soule plays Aristotle 'Tut' Jones. Ikky is the comic relief mechanic and Tut is the science guy. They're color coded for easy identification.
Captain Midnight and his gang have a fancy plane and live in a nice matte painting. That's their base on the right. Nice, huh.