- Numbuh 2 as Duck
- Trevor as Edward
- Numbuh 1 as Thomas (Non-Speaking Role)
- The Kid as James (Non-Speaking Role)
- Heinrich Von Marzipan as Diesel (Mentioned)
- Stan Smith (From American Dad) as Sir Topham Hatt
- Fat Tony (from The Simpsons) as The Barber
- Ringo Starr as UK Narrator
- George Carlin as US Narrator
- Numbuh 2: It's not fair. Heinrich Von Marzipan has been telling lies about me and made Stan Smith and all the kids think I'm horrid!
- Trevor: I know you aren't, and so does Stan Smith. You wait and see. Why don't you help me with these Ice Cream Men?