Tim meets Dean Karnazes - a man who has run 350 miles without stopping and completed 50 marathons in 50 days, without breaking a sweat. But does Dean's extraordinary stamina make him a real-life Captain America? Tim challenges Dean to three super tests in order to prove, or disprove, these amazing super human powers.

Tim meets Anthony Kelly, a man who holds 13 world records for his super-fast reactions; who is a master in ten martial arts and who can catch flying arrows with his bare hands - blindfolded! But does Anthony's extraordinary ability to react with lightening quick speed make him a real life Hawkeye? Tim challenges Anthony to three super tests in order to prove, or disprove, these ultra-fast super human powers. Can Tim beat the man who holds the record of the fastest reaction time in the wrld and catch a flying arrow with his hands? This is exactly as dangerous as it sounds, so Tim uses state of the art technology, real medical science and his very own Mission Doctor as he prepares for his challenges.

Tim Fitzhigham meets the humans who defy science and puts their powers to the test - against himself. In this episode Tim meets Wim Hof - a man who runs marathons in the arctic; swims underneath ice and climbs mountains in his pants. But does Wim's extraordinary ability to withstand extreme cold make him a real life Iceman? Tim challenges Wim to three super tests in order to prove, or disprove, these amazingly cool super human powers. Can Tim survive the coldest conditions imaginable as they jog across the top of an Icelandic glacier and swim amongst icebergs dressed only in swimming trunks? This is exactly as dangerous as it sounds, so Tim uses state of the art technology, real medical science and his very own Mission Doctor as he prepares for his challenges.Tim Fitzhigham meets the humans who defy science and puts their powers to the test - against himself.