<p>On a mysterious invisible zeppelin floating high (well, high enough) above the earth, young Mabel starts her new job: handling the telephones for the Star Sentries, the world's leading team of super-powered heroes. But is she ready to handle calls from quirky heroes, oddball villains, and the people in need?</p>

He's Not a Goodger

When the call for action comes, they take a message!
In this original audio sitcom: In an invisible zeppelin floating over the globe, Bruce and Mabel answer the phones for the world's leading hero team, the Star Sentries. They handle the calls from citizenry in distress, the villains seeking to destroy, and the heroes in need of a quick chat.
START WITH EPISODE 1: MABEL'S FIRST DAY. Don't start with the most recent episode. There is a through-line here.