All In The Mind!

Three celebrities are given the ultimate memory test...

- Hannah Davies & Elaine Reilly

Fashion stylist Gok Wan has never been associated with science, TOWIE star Joey Essex definitely isn’t considered a history buff and nothing about former Blue Peter presenter Valerie Singleton screams UK grime music.

Yet in this one-offC4 special, they’ve each taken on the challenge to learn hundreds of facts on these unfamiliar subjects.