Jack meets the world memory champion and a man who can remember every day of his life.

Jack meets a man who is unable to recognise faces and puts a super-recogniser to the test.

Jack joins amputees trying to find out why they feel sensations in their missing limbs.

Jack meets a man who has bizarre hallucinations and witnesses cutting edge surgery.

Jack meets a woman who has lost all sense of time and reveals how time can be elastic.

Jack meets people with synaesthesia and experiences multisensory gastronomy.

Wim Hof teaches Jack how to control his pain and plunge into the ice cold sea.

Jack meets a man with Sudden Artistic Output syndrome and unleashes his creativity.

Jack meets two people who can’t stop falling asleep and finds out the consequences of sleep deprivation.

Jack meets a British man who awoke from a coma speaking only fluent French.