Jack joins amputees to find out why they still feel sensations in limbs that are no longer there.

Jack meets a man who has a rare condition where his brain conjures up bizarre hallucinations.

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

Meeting people with synaesthesia; 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.