As Alvin struggles with nightmares involving werewolves, the school play of Jekyll & Hyde is in jeopardy when the lead, Alvin, is suspended. In an attempt to boost his confidence, the principal suggests Theodore, who's suddenly going through some canine changes.

Top Cast

Ross Bagdasarian Jr.Alvin Seville / Simon Seville / Dave Seville (voice)

Janice KarmanTheodore / Brittany / Jeanette / Eleanor (voice)

Maurice LaMarcheMr. Lawrence Talbot (voice)

Miriam FlynnPrincipal Milliken (voice)

Rob PaulsenMr. Rochelle (voice)

April WinchellMadame Raya (voice)

E. G. DailyNathan (voice)

Frank WelkerWerewolf Vocal Effects (voice)