This was a wonderful show that demonstrates it's possible to make good television entertainment on a budget. Using a handicapped super-spy as an excuse to parody the inane workings of every day office life was inspired. Anyone who has ever been stuck in a job for which they are obviously over-qualified will immediately sympathise with Adderly, and with those who are supposed to supervise him.
I first saw the programme on US late-night television (CBS?) in the 1980's, and I've never seen it again. No big special effects, no amazing stunts, no cast of thousands. Just a wonderful little show with humour and pathos.
Isn't there somewhere in our 5000 channel universe where this could be re-re-run?