Victoria Coren Mitchell hosts the quiz where knowledge only gets you so far – logic and lateral thinking are the vital extra ingredients.
A coveted place in the third place play-off is at stake: one team will have to settle for being in the final.
Here's a question: Andrea Ghez.
Why only one clue? Well, that's all they needed on the night. Join Victoria for the answer.
Semi-Final 2: Also Rans v Mercians