The original series was not a flop at all, it was very successful. There wasn't another series because the producer of it ended up being convicted of murdering his wife, I think on holiday in Mexico, its on Google and a documentary was made about the murder investigation.
I watched the original in the OO's, the prize was a million pounds as it was on a commercial channel, either ITV or C4. Charlotte Hoborough,a police officer from Wales won the million. The newspapers were full of a sexual relationship between her and a fellow contestant, which her husband was not too happy about.
It was a really good series overall, I was disappointed it did not continue. Pleased that the format of this new BBC series is almost exactly the same.
A female comedian, whose name escapes me, was also one of the original contestants. If you search the old series on ypi tube you will recognise her instantly.