- Numbuh 1 as Diesel
- James Nixon McGarfield as Duck
- Toilenator as Henry
- Stickybeard as Gordon
- Chad Dickson as James
- King Sandy as Percy (Cameo)
- Master Tubby Bear (from Noddy's Toyland Adventures) as Sir Topham Hatt
- Ringo Starr as UK Narrator
- George Carlin as US Narrator
- James Nixon McGarfield: There are two ways of doing things; The Forth Grade President way or the wrong way. I'm the Forth Grade President and....
- Toilenator, Stickybeard and Chad Dickson: Don't we know it!