Masters Of Technology World, 8.30pm This is a series of one-on-one conversations with five revolutionary thinkers who have changed the way we live today. The first episode drives into the future to see how Geoffrey Ballard's hydrogen fuel cell may someday power zero-emission vehicles. Time magazine selected Ballard as one of the five 'Heroes for the Planet' in 1999. He has led the way in developing the Ballard fuel cell, which generates electricity by combining hydrogen and oxygen without any combustion. The only by-product is water. With 800 million cars slowly choking the planet, Ballard's technology promises the opportunity for clean and unlimited energy. Tonight's programme goes to Vancouver, British Columbia, to talk with Ballard about his amazing odyssey and how he took on the automotive establishment in seeking to prove that cars need not be polluters. Today, the company he founded, Ballard Power, is backed by funding from some of the major car manufacturers. In this programme, Ballard details how he and his team developed the hydrogen fuel cell; the many bumps along the way in its production and the future prospects for what he calls 'the hydrogen economy Driven To Destruction Pearl, 8.30pm Tonight's programme goes behind the glamorous facade of the Monte Carlo Rally to see what it takes to turn a regular car into a masterpiece of engineering technology. We see how the teams of engineers and technicians toil to produce cars with a competitive advantage that can often only be measured in fractions of a second. The Snake Wranglers: Bad-Rap Rattlesnakes National Geographic, 9pm Distinguished herpetologist Jesus Rivas (above) drives through the south-eastern United States to capture some of the country's most venomous snakes. From his laboratory at the University of Tennessee in Knoxville, Rivas travels upstate to the woods outside Edwina, where he meets a Pentecostal Church preacher, Reverend Jimmy Morrow, to hunt for an integral component of the cleric's weekly worship: copperheads. Then off they go to the church, where remarkably, believers handle these deadly, venomous vipers without suffering any bites. Next, Rivas hits the swamps of Aiken, South Carolina, where herpetologist Whit Gibbons risks life and limb measuring the aggressive behaviour of another notorious pit viper: the cottonmouth. But this road-trip isn't just academic: Rivas also travels to Leesburg, Georgia, to investigate the death of a two-year-old boy who had been bitten by North America's largest venomous snake, the eastern diamondback rattlesnake. Was this attack an act of aggression, or simply a defensive reaction? To find out, Rivas heads to Tallahassee, Florida, where rattlesnake expert Bruce Means puts this giant pit viper's disposition to the test. The King Of Queens Star World, 8pm Doug (Kevin James) and Carrie (Leah Remini) are back for a second season of comedy about the ups and downs of married life in the New York suburb of Queens. Tonight, they disagree whether Doug should buy a motorcycle and Arthur (Jerry Stiller), Carrie's cantankerous, basement-dwelling father, starts to embellish his resume in an attempt to find a job.