I came across this on YouTube whilst searching for something completely different. I watched this at school and, ironically, the Betamax tape was of rather poor quality so to us the programme was in black and white with horizontal lines throughout. Even at a young age I wondered if that was all part of the show. I have looked for this before but to no avail. Judging by how long this has been uploaded to YouTube I think I had misspelled 'Interference' in my search.