Carmelita and Uncle Matt find themselves in a haunted house, but the "ghosts" are actually enemy agents who are trying to frighten away visitors in order to develop a nitroglycerin bomb.
| Actor | Role |
|---|---|
 Lupe VélezCarmelita Lindsay | Carmelita Lindsay |
 Leon ErrolUncle Matt Lindsay / Lord Basil Epping | Uncle Matt Lindsay / Lord Basil Epping |
 Charles 'Buddy' RogersDennis Lindsay | Dennis Lindsay |
 Elisabeth RisdonAunt Della Lindsay | Aunt Della Lindsay |
 Donald MacBridePercy Fitzbadden | Percy Fitzbadden |
 Minna GombellEdith Fitzbadden | Edith Fitzbadden |
 Don BarclayFingers O'Toole | Fingers O'Toole |
 Lillian RandolphHyacinth | Hyacinth |
 John McGuireLuders | Luders |
 Mantan MorelandLightnin' | Lightnin' |
 Harry TylerBascombe | Bascombe |
 Marten LamontMr. Harcourt | Mr. Harcourt |
 Richard MartinEpping's Chauffeur | Epping's Chauffeur |
 Barbara MoffettSecretary | Secretary |
| LLinda RivasMinor Role | Minor Role |
 Mary StuartMinor Role | Minor Role |
| SSally WadsworthMinor Role | Minor Role |
| JJulie WarrenSecretary | Secretary |
| JJane WoodworthEpping's Main Secretary | Epping's Main Secretary |