The Master Builders

Official synopsis
Buster struggles to build a birdhouse that will save the community garden from pests, while Muffy and Francine design a cat toy that they think will really change the pet toy game.

Plot
Buster has to build a bird house for the Purple Martin. The birds will keep the Cabbage Butterflies from eating Fritz's garden.

Major

 * Buster Baxter
 * Fritz Langley
 * George Lundgren
 * Muffy Crosswire
 * Francine Frensky
 * Nemo
 * Arthur Read
 * Catherine Frensky
 * Pet Store Owner

Minor

 * Bitzi Baxter
 * Ed Crosswire
 * Wally
 * Potato (Cat)

Cameo

 * Brain
 * Mrs. Powers
 * Portia Demwiddy

Trivia

 * In the beginning of the episode, Muffy is wearing the same clothes that she was wearing when she was news reporter in "Maria Speaks."
 * At the beginning of the second part, Fritz is depicted to be like "Absolem" from Lewis Carrol's Alice and Wonderland. Instead of smoking a hookah, he is blowing bubbles.
 * This episode reveals that Catherine attends a Career and Technical Education high school, and features extensive use of the school's 3D printer.