One participant. Twenty-one questions. All that is required is the ability to tell the truth, the whole truth, and nothing but the truth.
Jeopardy!
1984
The Circle
2020
The Mole
2022
The Traitors
2023
The Challenge
1998
The Chase
2009
Squid Game: The Challenge
2018
Wipeout
2008
Beat Bobby Flay
2013
The Masked Singer
2019
Pointless
The Voice
2011
Beast Games
2024
Who Wants to Be a Millionaire?
Dating Naked UK
Celebrity Family Feud
2015
Top of the Pops
1964
Wheel of Fortune
1983