Eccentric scientist Harper lives in a spooky mansion with all the trimmings: hidden lab, secret panels, inscrutable butler, and greedy relatives with unusual talents. When Harper seems to be murdered, Charlie Chan (with the uninvi...
Directed byPhil Rosen
Written byGeorge Callahan, Earl Derr Biggers
CountryUnited States
Runtime66 min
On screen
Sidney Toler
Mantan Moreland
Edwin Luke