My Life as a Dog - Season 1 Episode 9 The Fugitive
Overview: A.J.'s parents send their daughter to private boarding school when they believe A.J. is causing too much trouble at her public school. She soon runs away. When Johnny brings home a real caboose to stick in the backyard, Zoe has some complaints. Eric uses it to create a brand of 'tree house' and the run-away A.J. uses it for her private sanctuary.