Wilby Daniels, a successful lawyer running for District Attorney, suddenly finds himself being transformed into an English sheepdog. Somehow he has to keep his change a secret and find just what is causing it, all the while eluding the local dog catcher.
| Actor | Role |
|---|---|
 Dean JonesWilby Daniels | Wilby Daniels |
 Suzanne PleshetteBetty Daniels | Betty Daniels |
 Tim ConwayTim | Tim |
 Keenan WynnJohn Slade | John Slade |
 Jo Anne WorleyKatrinka Muggelberg | Katrinka Muggelberg |
 Dick Van PattenRaymond | Raymond |
| SShane SinutkoBrian Daniels | Brian Daniels |
 Vic TaybackEddie Roschak | Eddie Roschak |
 John MyhersAdm. Brenner | Adm. Brenner |
 Richard BakalyanFreddie | Freddie |
 Warren BerlingerDip | Dip |
 Ronnie SchellT.V. Director | T.V. Director |
 Jonathan DalyT.V. Interviewer | T.V. Interviewer |
 John FiedlerHowie Clemmings | Howie Clemmings |
 Hans ConriedProf. Whatley | Prof. Whatley |
 Michael McGreeveySheldon | Sheldon |
 Richard O'BrienDesk Sergeant | Desk Sergeant |
 Richard LaneRoller Rink Announcer | Roller Rink Announcer |
 Benny RubinWaiter | Waiter |
 Liam DunnDogcatcher | Dogcatcher |
 Karl LukasPainter | Painter |
 Pat McCormickBarman | Barman |
 Milton FromeNot listed | Not listed |
 Danny WellsPolice Official | Police Official |