Sir Alvin is an episode of The Alvin Show series.
Daisy Belle comes over to stay at the Seville House while her mother is shopping. When Simon and Theodore take off into another room, Alvin's forced to spend time with her. In order to amuse the girl, Alvin is forced to use his imagination to create a medieval fantasy. Daisy plays the part of a prisoner held by an evil fire-breathing dragon and Alvin is her brave knight trying to rescue her, but the dragon unfortunately is more cowardly than fierce. Before Alvin can save her, her mother arrives to take Daisy home.
- "Git Along, Little Doggies"
- Alvin tricks Dave into leaving the garage so they can go in and play with his tools, paints, and everything else they're not supposed to. While they sing Theodore makes seven horses, one in which he rides on. Meanwhile Alvin keeps distracting Dave with the doorbell until Dave catches him. When he finds them in the garage, he gives them three seconds to clean their mess.
- "Down in the Valley"
Clyde Crashcup Segment
- Invents Crashcupland
- In the main plot, Alvin's shield re-appears in Alvin's hand after the dragon eats it.