Marshall is scheduled to visit the dentist for a retainer, but he fears that he might end up the same way as the previous retainer recipient – he became able to hear what the dogs really say, and that was something they really didn't like.
| Name | Type | Role | |
|---|---|---|---|
| Karl Schaefer | Writer | ||
| José Rivera | Writer | ||
| José Rivera | Producer | Producer | |
| Gary Markowitz | Producer | Producer | |
| Jon Poll | Producer | Producer | |
| Walter Barnett | Producer | Producer | |
| Lou Cutell | Guest Star | Old Man Dithers | |
| Vincent Schiavelli | Guest Star | Dr. Eukanuba | |
| Lauri Hendler | Guest Star | Fifi Voice | |
| Patrick LaBrecque | Guest Star | Steve Konkalewski | |
| Aron Kincaid | Guest Star | Fluffy Voice | |
| Karl Schaefer | Executive Producer | Executive Producer | |
| Terry Dunn Meurer | Executive Producer | Co-Executive Producer | |
| John Cosgrove | Executive Producer | Co-Executive Producer | |
| Joe Dante | Director | ||
| Charles Hughes | Crew | Production Designer | |
| Jon Poll | Crew | Editor | |
| Jonathan West | Crew | Director of Photography | |
| J. Peter Robinson | Crew | Music | |
| Omri Katz | Actor | Marshall Teller | |
| Justin Shenkarow | Actor | Simon Holmes | |
| Mary-Margaret Humes | Actor | Marilyn Teller | |
| Francis Guinan | Actor | Edgar Teller | |
| Julie Condra | Actor | Syndi Teller |