- Michael Shayne as Barney
- Kay Bentley as Baby Bop
- Helen Carlson as Kathy
- Everett Jason as Shawn
- George Trautwein as Michael
- Carl Izzard as Professor Tinkerputt
- Leander Jones - Porter as Carlos
- Tom Linscott as Derek
- Engineer McGowan as Mr. Boyd
- Conductor Lyons as Mario (from Season 7)
- Conductor Meyers as Tony (from Season 7)
- Farm Lady as Luci
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