Uploaded January 2026 | Updated September 2026, 2 weeks ago

---

You can now watch every series of QI, including this one, on iPlayer! ▶ qi.com/iplayer

Follow QI on Twitter ▶ twitter.com/qikipedia
Follow QI on TikTok ▶ tiktok.com/@theqielves
Follow QI on Facebook ▶ facebook.com/officialQI
Follow QI on Instagram ▶ instagram.com/theqielves
Subscribe on YouTube ▶ youtube.com/theqielves
For more visit ▶ qi.com

This clip is from QI Series U, Episode 14, 'Underground & Underwater' with Sandi Toksvig, Alan Davies, Zoe Lyons, Dan Tiernan and Josh Widdicombe.