I always thought what a good and original series this was. It's aged a bit but still good to watch, especially of how the world was at the end of the seventies.
All the episodes are available on YouTube.
All the episodes of Man In a Suitcase are on as well. Man In a Suitcase was one of the better more grown up series, compared to the Avengers, Adam Adamant and The Saint, although I enjoyed all those as a kid.