Does anyone else remember a late 70s/early 80s kids show, Captain Zepp Space Detective?? It was out about the same time as The Adventure Game (sheer genius!) but was live action filmed against a painted background.
This guy Captain Zepp had to solve a mystery with the help of an audience of kids over the 25 mins. Everyone I mention it to thinks I'm going mad, (and its not listed on http://www.sausagenet.com/ either and I'm starting to wonder if they are right...!)