Let's get to a big question. How far would you go to win on "who wants to be a millionaire"? Would you cheat? It is a jaw-dropping "what would you do?" And john quinones has the story. John? Reporter:... See More
Let's get to a big question. How far would you go to win on "who wants to be a millionaire"? Would you cheat? It is a jaw-dropping "what would you do?" And john quinones has the story. John? Reporter: Thousands of hopefuls line up outside the new york city studio to take the exam that could getm on the show. And make them filthy rich. Yeah. 67. Reporter: So, what would you do if the test taker next to you started cheating? Oh. Spread sheet program. Oh. Yeah. I'm going to need a lifeline for this one. Maybe we should ask the audience. Reporter: Will these real contestants stand up to our cheaters before they go on to win it all? What would you do? Our hidden cameras are rolling, as this group of potential contestants is about to start the audition test. They have no idea our two actors are sitting right next to them. Everybody wants to be a millionaire here? Yeah. Terrific. This is going to be 15 questions. You have ten minutes to take the test. I'll be back in a few moments. Congratulations, everybody. Ten minutes. Reporter: And they're off. And no one is watching. Reporter: Our actress, tracy, can't help herself. But this woman is not playing along. Does anybody know eight? How stupid are you? Do your own test. I just want to be a millionaire. It's stressful. I don't want to hear it anymore. Neither does anyone else. So, we shouldn't ask the audience, is what you're saying? Shut the up. Reporter: The tension is rising as the clock ticks away. Drop it. Reporter: Time is up. Our producer returns. How did it go? I did very well. I did good. I knew a lot of the answers. Reporter: She may feel pretty confident. But her fellow test takers feel pretty upset. There were people in the room talking while we were taking the test. I drove all the way from texas. I agree with what he's saying. You're not supposed to cheat. We didn't cheat. I heard you ask about one of the questions. I asked. But nothing answered. You're not supposed to speak. How dare you accuse me of cheating, kentucky. Where is john quinones? Reporter: Funny they should ask. It's "what would you do?" Millionaire style. John never had an introduction quite like that one. "What would you do?" Is going to be on tonight at 9:00, 8:00 central. Don't miss it, right here on abc. I love those.
This transcript has been automatically generated and may not be 100% accurate.