A “Danger!” The contestant revealed they are battling stage 4 cancer during Tuesday night’s game.

Chris Burge, a high school teacher from Farmers Branch, Texas, shocked viewers with his cancer news during the episode there host Ken Jennings talking to the contestants.

“Chris, understand you’re facing a health challenge right now that you wanted to talk about,” Jennings, 50, said.

“Yeah, I’ve been battling stage IV colon cancer since May,” Burge told the host.

Jennings, taken aback by Burge’s admission, simply replied, “Oh wow.”

Burge then advocated that people should be checked for cancer.

“Among young adults, diagnoses have increased a lot in recent years,” he explained. “Definitely encourage people not to ignore any kind of symptoms. Definitely push to get tested, especially if you have any family history of it.”

“That’s a good word to get out there,” Jennings told Burge. “Thank you so much, Chris.”

After the Jeopardy and Double Jeopardy rounds, Burge was in third place with 1,600. Ahead of him were Mikey McCullough, a librarian from Baltimore, Maryland with $20,200, and Paul Clauson, a tax analyst from Madison Heights, Michigan with $11,000.

The final Jeopardy clue was: “At 800 West Main & 700 Central in this town is a business and a location both involved in the Triple Crowns.”

The answer was “Louisville” – and Burge was the only person who got it right.

But McCullough only lost $2,000 so she still won the game by $18,200.

In one Reddit thread for the episode, fans showed Burge support for revealing his cancer diagnosis on the game show.

“Kudos to Chris for using his time to raise awareness of colorectal cancer being diagnosed in young adults long before screening starts at 45. Don’t ignore the symptoms. Best wishes to you Chris,” one viewer wrote.

Another person said: “Here’s wishing Chris Burge a full and complete recovery. You did well against two strong competitors Chris and I’m rooting for you. Refua Shlema! But also…tick off a few more bucket list items!” Well done.”

“Chris, you did well too! Good luck as you navigate your challenging diagnosis. Thanks for taking the time to show the importance of screening!” added another fan.

Someone else wrote: “Chris shares his diagnosis and the battle hit close to home! I’m glad he took the opportunity to raise awareness. Colon cancer sucks! (All cancer sucks!)”

A fourth viewer praised Burge for his “inspiring” message about cancer.

“Danger!” broadcast weekdays at 7 p.m. ET.