Bradley Walsh was left shocked tonight as The Beast, Mark Labbett revealed what fellow Chaser Jenny Ryan's former job was.
Jenny is one of the brainiest Chasers, often managing to beat the team before her and her former job could be the reason for her success.
During tonight's show there was a question about "QI elves" and Mark was quick to explain how his fellow Chaser The Vixen was involved.
The Elves are the team of writers, researchers and comedians behind QI's shows, books and podcasts.
After Mark and contestant Nuala both got the question correct Mark said: " Jenny was a QI elf."
Bradley looked shocked and said: "She was not."
Mark replied: "Why do you think she has so many green outfits?"
Bradley said: "Are you on the wind-up?"
Mark said: "No I'm not, do you know where that knowledge base comes from, she genuinely was."
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And viewers at home were also shocked by Mark's revelation, with others expressing their love for the panel show.
Swalk said: "Jenny was a QI elf???????"
Steve said: "I love QI"
And another said: "Love QI (thumbs up emoji)"
After the revelation contestant Nuala, 52, managed to sail easily past Mark in the head to head to take £7,000 back to her team.
Her fellow contestant Sarah was also quick to see off The Beast, as she added £5,000 to the pot.
*The Chase continues at 5pm on ITV tomorrow