Season 1 Episodes65
Cast1

Jamie Croft
Karl,Sebastian, Mr Keller
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Ranked #7 of 26 in Season 1•+0.3 vs season avg
After Karl and Theresa invade the treehouse, Heidi and Peter can't agree on what to do. Heidi turns to Grandfather for help.

Jamie Croft
Karl,Sebastian, Mr Keller
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"Attack the Treehouse" is episode 11 of Heidi season 1. It scored 6.4/10 from 14 votes, ranking #7 of 26 episodes this season (season average 6.1). It aired on April 19, 2015.