is the 17th episode of the fourth season of the Disney Channel sitcom Austin & Ally . Originally aired on November 22, 2015, the episode centers on the group's high school graduation and a crisis involving a missing book. Plot Overview
: The premiere was watched by approximately 1.73 million viewers. [S4E17] Cap and Gown & Can't Be Found
: Trish realizes she doesn't have many memorable high school moments captured for the yearbook. To fix this, she spends the episode faking elaborate "memorable moments" to ensure she is featured in as many photos as possible. Key Moments & Characters is the 17th episode of the fourth season