JA
Notable that lost shows claims that 2 episodes of the 1994 series are missing... even though Challenge showed all 180.
https://www.tvbrain.info/tv-archive?showname=blockbusters&type=lostshow
Though they also say episodes of Bullseye and Family Fortunes that Challenge have shown are missing too (Challenge definately showed all 26 episodes of Series 4 of Family Fortunes even though that site says two only exist on VHS). Not sure how reliable that site is any more. Other stuff from other shows it says are "missing" are listed as held by the BFI on broadcast formats as well, even if the original companies somehow don't have the tapes.
https://www.tvbrain.info/tv-archive?showname=blockbusters&type=lostshow
Though they also say episodes of Bullseye and Family Fortunes that Challenge have shown are missing too (Challenge definately showed all 26 episodes of Series 4 of Family Fortunes even though that site says two only exist on VHS). Not sure how reliable that site is any more. Other stuff from other shows it says are "missing" are listed as held by the BFI on broadcast formats as well, even if the original companies somehow don't have the tapes.