Boundless Season 2 Episode 4 Holland: SUP 11-City Tour ( Air Date 2014-04-21 ) Genre Documentary, Reality category. Overview "Hoping to redeem themselves after a disappointing upset in Hawaii, Turbo and Simon take on a five-day, eleven-city stand-up paddleboarding race through the picture-perfect canals of northern Holland. But redemption comes at a price: sweat and pain.".