Through the Keyhole began on British television in the 1980s, presented in the studio by Sir David Frost with filmed tours of a mystery home. The format asked a celebrity panel to work out the owner from clues in the rooms, furniture and personal objects. Its cheerful theme became part of the show's identity during that era, signalling light entertainment rather than serious mystery. The programme was later revived in other decades, but online this short 1980s theme is shared mainly for retro television nostalgia and playful reveal edits.