No - Captain Scarlet and the Mysterons is not the name of a band you've never heard of before. It's the name of a Gerry Anderson produced TV series that you've (probably) never heard of before. I'm doing a slow watch of the entire original series from 1967-68 and loving every minute if it! If you are wondering what it's all about check out the two videos below.
First up is the opening titles followed by a Primer on the series from the Anderson Entertainment people.