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.

Lupe Vélez
as Carmelita Lindsay

Leon Errol
as Uncle Matt Lindsay / Lord Basil Epping

Charles 'Buddy' Rogers
as Dennis Lindsay

Elisabeth Risdon
as Aunt Della Lindsay

Donald MacBride
as Percy Fitzbadden

Minna Gombell
as Edith Fitzbadden

Don Barclay
as Fingers O'Toole

Lillian Randolph
as Hyacinth

John McGuire
as Luders

Mantan Moreland
as Lightnin'