Danyal, Rose and Tia get to test their knowledge of Horrible Histories with quirky quiz questions, set by the country's finest historical brains, and Rattus Rattus.

Rattus tries to ease Dave's ailments with historical cures, and Ruhama, Ben and Charlotte battle it out to win Year Spheres in games, including Calamity Train and Pig Piano.

Rattus pitches a disgusting new show idea to Dave, while Affan, John Oscar and Elisabeth compete to win Year Spheres in gruesome games, including Factory Fingers and Mega Bear Picnic.