The Never-Ending Treehouse (S01E20)

S01E01 Built To Build S01E02 Pup DE-Struction S01E03 Hush Puppies S01E04 Beach Day Build-Off S01E05 Bailey's Birthday Coaster S01E06 Doggone Tired S01E07 Fast and Furriest S01E08 Luna Digs Deep S01E09 Bailey and the Doggy Doctor S01E10 Dog for a Day S01E11 Adventures in Bulldozing S01E12 Safe and Hound S01E13 Home Stinky Home S01E14 Dump Truck Dilemma S01E15 Builders to Bakers S01E16 Fire Truck Frenzy S01E17 Robo Cat S01E18 Underwater Pups S01E19 The Wishbone Comet S01E20 The Never-Ending Treehouse S01E21 Professor Frazzle S01E22 A Crabby Neighbor S01E23 Luna's Bad Hair Day S01E24 Happy Maya's Day S01E25 Amusement Park-Ing S01E27 Happy Howl-O-Ween S01E29 The Mayor Mover S01E31 Itty Bitty Barn Build S01E33 Pupstruction Saves Christmas S01E35 Sunniest Snow Day S01E37 Valentine's Day Dogs S01E39 Pizza-Struction S01E41 A Bright Idea S01E43 Pup Princess S01E45 Pirate Party S01E47 Mayor Boots S01E49 The Petsburg Music Festival