- Yukon Cornelius as Dr. Clay
- Miss Jessica (from Santa Claus is Comin' to Town) as Lorraine
- Hermey as Sawyer
- Karen (from Frosty the Snowman) as Hazel
- Bumble the Abominable Snow Monster as Reed
- Donner as Dr. McCarthy
- Comet as Caleb
- The Girl (from The Polar Express) as Julia
- Sister (from The Polar Express) as Mandy
- Rudolph as Kyle
- Kris Kringle (from Santa Claus is Comin' to Town) as Troy
- Mother (from The Polar Express) as Winter
- Clarice as Hope (dolphin)
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