Space 1999 was awesome. I watched re-runs of it in the 80s, along with re-runs of pretty much every other 'B' rated sci-fi show ever made.
The Greatest American Hero was great too ! I hope the follow through with a remake of that show. Most superhero shows these days only briefly touch on that awkward phase between being normal and having awesome superpowers. It's like, one day they are normal, the next day they have powers, spend a bit of time figuring out said power, then the day after that they are saving the world/galaxy
Whereas The Greatest American Hero spent an entire series run trying to figure out the whole superhero powers thing.