By 1973 everyone was obsessed with Bok and competitions were run to literally win a life sized Bok were commonplace. The Radio Times famously printed instructions on the 10th Anniversary cross over episode of Dr Who and Bok, - the first of many mash ups in the future (Studied intensely by many fans like @zozo ). The BBC instructions were however slightly miss scaled and would have resulted in making a grey wetsuit sixty four feet long