
Henry Hull
Dr. Glendon

After botanist Wilfred Glendon travels to Tibet in search of a rare flower, the Mariphasa, he returns to a London haunted by murders that can only be the work of bloodthirsty werewolves.
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Henry Hull
Dr. Glendon

Warner Oland
Dr. Yogami

Valerie Hobson
Lisa Glendon

Lester Matthews
Paul Ames

Lawrence Grant
Sir Thomas Forsythe

Spring Byington
Miss Ettie Coombes

Clark Williams
Hugh Renwick

J.M. Kerrigan
Hawkins

Charlotte Granville
Lady Forsythe

Ethel Griffies
Mrs. Whack

Zeffie Tilbury
Mrs. Moncaster
Jeanne Bartlett
Daisy

Reginald Barlow
Timothy
Egon Brecher
Priest

Wong Chung
Coolie
J. Gunnis Davis
Detective

Herbert Evans
Detective Evans

Eole Galli
The Prima Donna