Scratch invites real ghosts to a Halloween "haunted house" to amp up the fun, but things spiral out of control when the Chens and a horde of Frightmares show up.
| Name | Type | Role | |
|---|---|---|---|
| Paul Chang | Writer | ||
| Eden Riegel | Guest Star | Harriet (voice) | |
| Vincent Rodriguez III | Guest Star | Jeff (voice) | |
| Grey DeLisle | Guest Star | Lucretia (voice) | |
| Lara Jill Miller | Guest Star | Libby Stein-Torres (voice) | |
| Aparna Nancherla | Guest Star | Sheela (voice) | |
| Leonard Wu | Guest Star | Ruben Chen (voice) | |
| Kari Wahlgren | Guest Star | Grimbella (voice) | |
| Zeno Robinson | Guest Star | Nashua / West (voice) | |
| Sue Ann Pien | Guest Star | June Chen (voice) | |
| Greg Baldwin | Guest Star | Bartholomew (voice) | |
| Alan Lee | Guest Star | Ollie Chen (voice) | |
| Stephanie Sheh | Guest Star | Esther Chen (voice) | |
| Jules Medcraft | Guest Star | Andrea Davenport (voice) | |
| Diedrich Bader | Guest Star | Mr. Bates (voice) | |
| Eric Edelstein | Guest Star | Geoff (voice) | |
| Rob Cantor | Guest Star | Additional Voices (voice) | |
| John DiMaggio | Guest Star | Sir Alistair (voice) | |
| Johnny Castuciano | Director | ||
| Sam King | Director | ||
| Ashly Burch | Actor | Molly McGee (voice) | |
| Dana Snyder | Actor | Scratch (voice) |