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.

Episode Synopsis: A couple in Oregon need extra room when their daughter comes home from college, so Pete builds a guesthouse in a tree.

A young couple has big dreams of a lighthouse treehouse atop a seaside seawall along the coast of Northwest Washington. Pete is challenged by the property’s incredibly steep grade and must deliver all of his materials to the site by way of barge only! The octagon-shaped, two-story, white-and-red shingled structure, which is housed among a group of cottonwood trees, features porthole windows, a wrap-around balcony, a nautical-themed interior and rainbow-colored glass. The couple, wanting to truly live off the grid, throws Pete a curve ball by asking him for a rainwater shower system, a composting toilet and supply power (where there is none). Surprisingly, Pete delivers a custom gift for the couple's pampered pooch: a 'backyard' high in the air!

The matriarch of a multi-generational Memphis family with a retreat in a wild bird paradise reaches out to Pete to build a giant bird nest treehouse. This “human nest” will pay homage to the magnificent egret nests that line the family’s lake, and will be housed in two hackberry trees and one sturdy oak.

A Texas Dad wants a mancave so he has somewhere to bond with his grandson. Pete builds a 600 square foot Western-style mancave treehouse with cigar humidor, meat smoker, flat screen TV, bathroom, stone walls, and can sleep 5.

Pete heads to Louisiana to build his biggest treehouse ever; a record-breaking, 1200 sq ft, tree village features 3 separate levels and a 70 ft bridge that connects to a platform set in a trio of nearby trees.

In Kentucky, Pete creates a treehouse with 17-foot-high ceilings and open-frame timber rafters, allowing a couple with a love of tree-climbing to harness up and dangle from both inside and out.

A large family from Independence, Ohio, runs a nonprofit organization Cornerstone of Hope, which provides grief services to anyone who has lost a family member. The family asks Pete to build a therapeutic space in the trees for Cornerstone of Hope, incorporating the nonprofit’s symbol, the butterfly. Pete jumps at this opportunity as he strongly believes in the unique healing power of trees and treehouses. He designs a butterfly-themed treehouse that stretches across six tree varieties, including a gorgeous cluster of maple, cherry, tulip and beech trees. The treehouse features a 400-square-foot deck, loft space, a butterfly wing-shaped jungle gym, a gigantic climbing net and a breathtaking butterfly chandelier. Pete really goes above and beyond when he outfits the treehouse with mechanical butterflies that can be enjoyed all year round!

Busy film industry clients in Fayetteville, Ga. request a treehouse on their exuberant 63-acre plot of land, inspired by mid-century architecture and equipped with a zip line.

Two sisters who run their family’s rural inn in Farmington, Pennsylvania, present Pete with a bear of a task: build an observation treehouse on their 1000-acre property, where they can watch the black bears roaming the land. Pete is a little nervous at first when it comes to his team building in the midst of these wild beasts, but he turns his fear into inspiration by creating his first-ever mid-century decagon treehouse with walls of glass and windows, a wrap-around deck, cathedral ceilings and a closed-circuit bear-cam tracking system nestled among three white oaks and standing more than 20 feet from the ground. For the interior, Pete incorporates mission-style furniture, a roaring fireplace and a handmade oak bar.

Captain Pete and his band of scurvy scallywags prepare to hoist a 20-foot high build of treehouse treasure on the Pacific Coast, complete with a 50 ft rope bridge, heated floors and hidden compartments; it's a pirate's life for Pete, YO HO!

On this special episode Pete and the NTS crew build the “Ultimate Treehouse” for the lucky winner of the Ultimate Treehouse Giveaway.

A family in Bedford, N.Y., spare no expense for a tree house that features a patio for barbecuing, a living room and a playroom with chalkboards.

A couple who live in a one-room yurt in Portland, Maine, want a space for entertaining, so Pete builds them a tree house 19 feet high that features a rooftop crow's nest, a copper roof and a wall of windows that offers scenic New England views.

Pete finds inspiration in old tales to build a mesmerizing treehouse, with a curved turret that soars two stories high and a deck to take in the amazing sights, over the stems of a twisty silver maple on the shore of Lake Chelan.

A barn-theme tavern—complete with a brewing system—that's accessible by a rope bridge 25 feet high is constructed for a family in rural Ohio, and Pete gets help with the project from some Amish neighbors.

Just one day of Christmas cheer isn’t enough for a real-life Santa and Mrs. Claus, who celebrate the season 365 days a year in Southern California. Old St. Nick and the missus call on Pete and his crew to spruce up their yard with some holiday magic. Pete creates a treehouse workshop complete with Santa's red chair, a naughty-or-nice drawbridge, a secret elf trap door, a candy cane and holly access bridge and some miracle Christmas snow...in the California desert!

Inspired by South American treehouse maestro Richard Brunnelli, Pete builds a hexagonal live-in treehouse for a Treehouse Workshop graduate in coastal Oregon.

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.

Pete builds an incredible, adventure-themed treehouse for a young, exploration-loving family in the heart of Pennsylvania’s Pocono Mountains. The family calls Pete and his crew to create a massive, two-story jungle masterpiece packed with secret doors and hidden passageways within a cluster of cherry trees! Pete delivers not just one but two bouncy suspension bridges, a daring rock-climbing wall anda living wall containing more than 700 live plants for this colossal treehouse, which overlooks a deep gorge. With a secret sarcophagus entrance, a second-sleeping loft and loads of adventurous novelties, this treehouse is sure to bring the family hours of fun, especially when Pete reveals his tailored, sentimental surprise: a tribute to the family’s beloved grandmother.

A Celtic-theme cottage in an olive tree in California features a circular design that includes a fireplace and a rain-maker to mimic damp Irish weather.

In the Season 1 finale, Pete builds a honeymoon suite for a couple who want to get married at Treehouse Point, but all of the other accommodations are booked.

A couple in Tulsa has two things in common: they are both expert gardeners and they both have Scottish heritage. They enlist Pete to build “something extraordinary” in their backyard by creating a treetop Scottish cottage 10-feet high in a robust pin oak.

Pete and his team undertake a sticky challenge and reinvent the classic single-tree treehouse; constructing a magnificent and whimsical beehive-like structure soaring 30-feet high in a majestic Douglas fir.

A nature-loving woman in Humboldt County, California, asks Pete and his crew to build a treehouse that pushes their skills to the limit. She feels cramped in her home and wants a permanent residence 60 feet up in the area’s giant redwood trees. Pete and crew take the comforts of home to new heights in this bohemian-chic, tri-level treehouse, which boasts a bathroom, lounge and bedroom loft spread out throughout three floors with low-hanging lights, tapestries, modular furniture and an overall genie-in-a-bottle aesthetic. The owner dreams of being able to see the Pacific Ocean from her cozy forest perch atop the redwood canopy, and Pete knows that he and his crew are the only ones who can deliver!