Daniel Browning Smith, a man with Superhuman flexibility, travels to India to investigate a local legend that a man has developed immunity to electric current and can let it pass through his body, unharmed. Can anyone really be immune to electrocution? Daniel next meets Scott Flansburg, dubbed the "Human Calculator." Scott can complex arithmetic (even square and cube roots) all in his head, faster than anyone on earth. Does his brain work in an entirely new way? Totally blind from birth, Juan Ruiz apparently visualizes the world using the same form of sonar used by bats and dolphins called echolocation. Juan demonstrates his incredible ability to Daniel by navigating around a complex course using only the echoes of his tongue clicks to guide him. Dennis Rogers is only 5ft 6", but is pound for pound the strongest man in the world. He demonstrates his sheer strength bending hammers and horseshoes at will.

Daniel is in Vegas to meet Bob Munden the planet's fastest gunslinger, rumored to be faster than the blink of an eye, and with accuracy second to none. Using electromyography, and the fastest camera technology in the world, we investigate whether his speed goes beyond what science says is humanly possible. Timo Kaukonen is a World Sauna Champion and pushes his body to the limits. He has lasted for 16 minutes in temperatures hot enough to boil water. Daniel investigates to find out if he has a genetic difference that sets him apart. Warrior monk Shi Yan Ming shocked the world by moving to New York in 1992, marking the first time that a Shaolin monk has ever defected from China. By harnessing the power of Qi, or vital energy, he's taken Bruce Lee's infamous "one-inch punch" to a new level. "Professor Splash," (aka Darren Taylor) is a world champion high-diver...with a difference. Daniel tries to find out how a man can survive a 35 foot belly flop into just one foot of water.

Daniel meets Dean Karnazes. He's run 50 marathons in 50 days, and then ran 1300 miles back to the start. But how can Dean's body not suffer the exhaustion and fatigue faced by everyone else on earth? John Ferraro is rumored to have a skull that can withstand sledgehammers, bowling balls and even jackhammers. Daniel investigates to find out if he has a genetic difference that makes his skull superhumanly strong. Chris claims to have incredible powers like that of the Marvel comic-book character "Destiny"; he believes that his dreams are a window into the future. But will Chris' remarkable claims of premonitions stand up to the scrutiny of our host? Kenny Muhammad, aka "The Human Orchestra", is the most extraordinary human mimic on the planet. This wizard of sound possesses an astounding ability that enables him to simultaneously generate an entire orchestra of sounds from his mouth.

Daniel's incredible journey continues, as he investigates Tim Cridland, who claims to be able to switch off pain. He demonstrates his ability to go beyond normal pain thresholds by impaling himself with skewers, with little or no bleeding. Derek Paravicini is a blind autistic man with an incredible "superhuman" gift. Derek can remember and accurate re-play any song he ever hears. Does his ability offer the world an insight into the power of the human brain? Jyothi Rai is known as India's Spiderman--scaling walls at an unbelievable speed. Able to run up a six-story structure in just seconds, Jyothi has perfected his climbing technique by taking inspiration from monkeys. Last year in Milan, nine trucks weighing a total of over 30,000 lbs ran over Tom Owen in quick succession. How can his body survive such force? Daniel tests Tom's abs to find out if he has the hardest muscles on earth.

Daniel meets Patrick Musimu, who's able to dive to 656 feet on a single breath; Miroslaw Magola claims to harnesses the power of psychokinesis; Shaun Ellis has become a wolf, by living, sleeping, bathing and feeding with a deadly pack of wolves.

Isao Machii is a modern day samurai with unbelievable sword skills; Dr. Norman Gary can control an entire swarm of bees; Steve Santini performs incredible escapes requiring dexterity and body control; Rusty Haight, has had over a 1,000 car crashes.

Tim Friede has made himself a human guinea pig, allowing some of the world's deadliest snakes to bite him; Dan Meyer is the best sword swallower in the world; Garry Stretch Turner claims to have the World's stretchiest skin.

A man claims to be able to knock another to the ground without touching him; Salim Haini eats anything; Daniel pits himself against Ron White, U.S. Memory Champion; Greg Poe claims to be able to withstand forces of up to 12G's.