On Thursday, the first ever tie-breaker in regular game play (it's been used in tournament play) happened in Jeopardy!'s nearly 54-year history. After all three contestants answered the Final Jeopardy! clue incorrectly, two were left with the same dollar amount: $6799. Unfazed, host Alex Trebek gave one final tiebreaking clue to determine the winner. Now, if neither of them had gotten that clue correct, Trebek would have kept giving them until one of them did.
(reddit)