…in tournaments? When there are no empty spaces to fill, is there a tie-breaker?
There’s a tiebreaker question. I guess if they both got it wrong they’d keep asking questions.
It has happened. Both the 1996 and 2012 Teen Tournaments had tiebreakers.
This intrigued me so I looked it up on youtube. The tie breaker question is like a regular Jeopardy question where you have to ring in. The first person to ring in and give a correct answer wins.
I thought the OP was asking what if, in a tournament with wild cards, two contestants ended up with the same dollar amount and were placed such that only one could advance.
It’s an interesting question. I’m not exactly sure. Maybe I’ll ask on the fan message board. 
I think that RickJay answered it. Unfortunately, the youtube link that hajario provided doesn’t work for me. I wonder how they accommodate the additional time required for a sudden death question into the telecast. Do they strip out a commercial or two?
Leaper’s question is about earlier rounds of the tournament. They have the winner of a given match movng on to the next round but also a couple of people who didn’t win who scored the highest (wild card). What happens if there is a tie there?
They probably strip out some of the filler, like Trebek expounded more detail on one of the answers, or the mini-interviews with the contestants. Commercials are the reason for a TV show’s existence; I highly doubt they’d strip any of them.
Ah, got it. Good question.
On my phone so can’t link but Wikipedia’s section on the Jeopardy TOC says that the tie breaker is whomever has the highest score after Double Jeopardy. Presumably, the next tie breaker is regular Jeopardy but it could still be tied there too. Maybe a coin toss after that?
Other notes, if a game ends in a three way tie at 0, no one from that game advances and there is an additional wild card.
If it takes more than one tie breaker question as posed in the OP, only the winning question is aired.
Knife fight.
Not academic enough.
Sabre fencing in a library.
Or fast-forward through the momentum-killing Clue Crew clues.
Or they’re asked to identify a “mystery man” in an old photograph.