Season 9

01 A Treehouse Fit for a Viking Episode 14th August 2017 Pete takes on his first international tree house in Norway; working alongside a local builder named Frode, the one-of-a-kind, 24-foot-high retreat accommodates eight and allows for stunning views of the nearby lake. 02 Hill Country Hideout Episode 24th August 2017 Pete and his gang ride out to the Lone Star State to build a double-decker hideout in Texas Hill Country; Pete creates rustic perfection in six live oak trees with a saloon-style first floor for sippin' sarsaparilla and a glass floor for views below. 03 Glamorous Glamping Retreat Episode 311th August 2017 The NTS team leave their tents behind and head to New Jersey to build a campers' retreat for an outdoor-loving couple; with a screened-in porch, floating barbecue deck and cozy hanging bed, this Adirondack style tree-cabin puts glamping in the trees. 04 Lost in the Forest II Episode 411th August 2017 Getting lost in the forest for some behind-the-scenes fun with tree house master Pete Nelson as he uncovers never-before-seen footage, bloopers and loads of extra tree house tours, including a new peek inside Dale Earnhardt Jr.'s arboreal escape. 05 Thrill 'n' Chill Treehouse Episode 518th August 2017 Pete descends upon western Washington to make a tree house for action and relaxation; with a 55-foot-long bouncy-bridge entryway into a 20-foot-high structure and a zip line that travels through the forest, this tree house generates non-stop thrills. 06 Jeffersonian Honeymoon Suite Episode 625th August 2017 Pete and his team descend upon Virginia for the first time to bring the tree house revolution to Bella Rose Plantation; drawing on the architectural innovations of Thomas Jefferson, Pete designs a luxurious two-story tree house with colonial columns. 07 The Bird Barn Treehouse Episode 71st September 2017 Two retirees get a retreat on their 100-acre Wisconsin farm; Pete builds a barnlike birdhouse with three separate pods -- an art studio, an office and a lounge -- complete with a screened-in porch and a deck overlooking their stable of alpacas. 08 City Sleeker Treehouse Episode 88th September 2017 Pete is back in Texas to build a sophisticated, sleek-and-chic treehouse in the heart of Dallas; Daryl and the NTS team put treehouse engineering to the ultimate test at Washington State University, proving down-to-the-pound the power of the TAB. 09 Grace VanderWaal's Got Treehouse Episode 915th September 2017 When asked in 2016 what she would do with her winnings, ``America's Got Talent'' Season 11 winner Grace Vanderwaal said she wanted a tree house built by Pete Nelson; the 13-year-old singer-songwriter's wish comes true. 10 Alaskan Mountain Treehouse Episode 1022nd September 2017 Pete builds an A-frame lodge in the shadow of North America's highest peak.