 In its original American broadcast, "Treehouse" was viewed by an estimated 13.37 million viewers and received a 5.7 rating/14% share among adults between the ages of 18 and 49.This means that it was seen by 5.7% of all 18- to 49-year-olds, and 14% of all 18- to 49-year-olds watching television at the time of the broadcast.The episode stayed even in the ratings from the previous episode, "Go Bullfrogs!