Through the Keyhole is part of a literally-glittering lineage of quiz shows that have been regenerated, rejuvenated or reformatted across the years (and even across continents). Here are 8 more that you need to know about...
1. You Bet!
You Bet! was a staple of Saturday night British telly in the 80s and 90s, but the original German version is still running on channel ZDF, with the same core idea of celebrities making wagers on whether normal people will be able to complete difficult or bizarre tasks - including a blindfolded farmer recognizing his cows by the sound they made while chewing apples, or this cool character popping balloon by doing The Worm. Attracting top-ranking celebrities including Angelina Jolie, Karl Lagerfeld and Bill Gates, Wetten Dass is one of the most successful Saturday television shows in Europe.
Decidedly peppier than it's UK spin-off, the GE College Bowl was the predecessor to University Challenge. Where Bamber Gasgoine (and latterly Jeremy Paxman) have focussed on intense academia and a compact filming style that's led to generations of viewers thinking the show has a two storey set, the College Bowl had a far sportier style: all college pennants and meeting the "coaches" before the big game. The questions were just as hard though.
3. Mr & Mrs
Proving how well you know your respective partner is the foundation of many a good quiz show, but Mr & Mrs has it down to a fine art. The format originated in Canada, with the first British version being a Welsh language version called Siôn a Siân, which still runs on S4C. Subsequently hosted in English by the likes of Derek Batey, Nino Firetto and Julian Clary, the show's celebrity spin-off All Star Mr & Mrs is currently filming its sixth series.
4. 8 Out of 10 Cats Does Countdown
Like retro Instagram filters and typewriter-style iPad keyboards, 8 Out of 10 Cats Does Countdown beautifully blends the old with the new, as Jimmy, Sean & Jon wreak comedy havoc whilst still actually playing Channel 4's longest running quiz (trivia fans will probably already know that Countdown was the first programme to be broadcast when Channel 4 launched), all under the watchful eyes of Rachel Riley and Susie Dent . We're also very excited that Rachel will be bringing some Countdown glamour to our We Love TV Quiz in May, which she'll be co-hosting with Mark Watson.
Brought back to TV screens in 2013 with Stephen Mulhern, the revived version of Catchphrase retains all the charm and character of the Murray Walker era, just with whizzier graphics and more contestants. Mr Chips is still around and it would seem that there's still every opportunity for hilariously lewd-looking reveals, as Kimberley Walsh, David Walliams and Emma Willis found out on the most recent Mother's Day Special...
6. Through the Keyhole
And of course, we couldn't finish without having a closer look Through the Keyhole! With the ever-industrious Keith Lemon taking on the role of both host and tour presenter, the last series nosed around the houses of Mary Berry, Mel B and John Prescott, to name a few, and we're looking forward to many more in series 2, as well as finding out what going on through t'keyhole of some of TV's big decision makers in Controller Through the Keyhole.
GEITF delegates will be treated to home truths and juicy secrets at Controller Through the Keyhole on 21 August 2014 - the opening session for this year's Festival. To ensure your place, book now and get the discounted Early Bird rate too!