Cheryl Hines
Luna (voice)
Jeff Daniels
Zartog (voice)
Patrick Warburton
Titan (voice)
Kristin Chenoweth
Kilowatt (voice)
Kenan Thompson
Ringmaster (voice)
Zack Shada
Comet / Nava Boy (voice)
Carlos Alazraqui
Houston (voice)
Omid Abtahi
Dr. Jagu (voice)
Patrick Breen
Dr. Bob (voice)
Jane Lynch
Dr. Poole (voice)
