Jeopardy! contestants and viewers alike were ... has now been branded as 'the most obscure' clue of all time. 'It's the building where the Stax records classic Knock On Wood was written but ...

Before Final Jeopardy, Hayes, a law student ... in the category “Places in the American Past” read, “It’s the building where the Stax Records classic ‘Knock On Wood’ was written ...