The celebrities were given a series of cryptic clues to identify four places in Great Britain which would form a giant X and the treasure was notionally buried at a fifth place where the lines crossed.
They then had to work out what the treasure was using lines from a cryptic puzzle that they may, or may not, have picked up along the way.
The two teams were encouraged to cooperate, rather than compete, and the show was designed to encourage them to tell interesting anecdotes and digressions.
The show was presented by comedian and author, Pete McCarthy until his death in 2004 and the question for one series were written by treasure hunt author, Dan James, and it is from his website that I include the first episode from that series below.
This recording includes former chorus girl and pub pianist, Irene Thomas (pronounced Irene-ie), who was the only woman to become both “Brain of Britain” and “Brain of Brains” and was a regular on Round Britain Quiz. (See her obituary)