It blends 2D animation with CG elements, and is set at Galaxy High, where a trio of young students try to balance their teenage lives with their training to become Space Marshals.

Team Galaxy is co-produced by several international broadcasters, including France 3, which was the first to begin airing it starting on 26 August 2006.

In the United States, Cartoon Network paid Marathon about $16–$17 million for 52 episodes and a premiere in fall 2006.

On the first day of school at Galaxy High, each student is assigned a pet robot called an UltraPet, who serves as their aide and companion.

Massive aerospace aircraft carriers owned by Galaxy High, which are the personal flagship of Director Kirkpatrick.