ALVINNN!!! and the Chipmunks 2015 Season 3 Episode 25 The Great Chipmunk Detective / Guitar Hero Episode Title: The Great Chipmunk Detective / Guitar Hero Episode Description: The Great Chipmunk Detective:Miss Miller reports that the cases of cleaning solution she's bought from late-night shopping channels, among other items such as weightloss belts, and leprechaun glasses, have been stolen, but Officer Dangus doesn't take her plight seriously; because of this, Eleanor offers to figure out who the perpetrator is for Miss Miller, enlisting Theodore to assist her. Spying Dangus with boxes of the same cleaning solution, Eleanor and Theodore follow him on they presume to be another caper of his, only to discover that the boxes he has were purchased by his mother, and the real criminal strikes again during the wild goose chase. Dangus discourages them from continuing their investigation, but mystery notes threatening them only intensifies their desire to figure out who's responsible for the crime... Guitar Hero:Miss Smith must learn how to play the guitar in an incredibly short amount of time, and reluctantly asks Alvin to help teach her, but refuses to reveal why she must learn so quickly. Alvin has difficulty teaching Miss Smith, who has difficulty learning from him, prompting the two to go their separate ways, while Miss Smith seeks lessons elsewhere. Curious about the entire situation, Eleanor and Theodore do a little investigating, and learn that Miss Smith's mother's 90th birthday is coming up, and that she wants to learn to play the guitar as a present for her, because of a lifetime of being made to feel inferior to her more successful and accomplished older sister...