The gang are going to see the circus, but a werewolf has come and is stealing jewelry, and he seems to have the power to make more werewolves. Bad news: Scooby got bitten by him and he might turn into a werewolf, too.
| Name | Type | Role | |
|---|---|---|---|
| Matthew Lillard | Guest Star | ||
| Grey DeLisle | Guest Star | ||
| Mindy Cohn | Guest Star | ||
| Frank Welker | Guest Star |