Anyone else remember the program? 

The original 30 minute Danger Man episodes are the ones where John Drake had an Amecian accent and worked for NATO. When Danger Man was resurrected in its hour long format (Secret Agent in the States), Drake was very much an Englishman working for a British department called M9.

Danger Man was a huge hit in the UK and made Patrick McGoohan a household name, reputedly the highest paid actor on British television at the time. McGoohan eventually tired of playing John Drake, and just as the series began filming in colour, he quit. TV mogul Lew Grade was so desperate to retain his services that he backed McGoohan's own pet project, The Prisoner.

Look out for Portmeirion (The Village from The Prisoner) doubling as foreign locations in several episodes of Danger Man.

Danger Man was the original British title, the show was renamed Secret Agent for the States (we didn't get that Johnny Rivers pop song in our titles either, we had an instrumental theme composed by Edwin Astley).

You could, but I don't. I tend to take McGoohan at this word that he was playing a different a character. After all, he could have gone on playing John Drake if he'd wanted to (Lew Grade would have been much happier if he had) but he quit to do his own thing. I think Number Six was in many ways McGoohan playing an idealised version of himself.

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I also own the DVD set and I felt it held up fairly well.  Obviously, it's a show very stuck in its time, but I actually enjoy such shows.