A psychic's girlfriend finds out that a lump on her back is a growing reincarnation of a 400 year-old demonic Native American spirit.
Tony Curtis
as Harry Erskine
Michael Ansara
as John Singing Rock
Susan Strasberg
as Karen Tandy
Stella Stevens
as Amelia Crusoe
Jon Cedar
as Dr. Jack Hughes
Ann Sothern
as Mrs. Karmann
Burgess Meredith
as Dr. Snow
Paul Mantee
as Dr. McEvoy
Jeanette Nolan
as Mrs. Winconis
Lurene Tuttle
as Mrs. Herz
Hugh Corcoran
as MacArthur
Anne Newman Bacal
as 10th-Floor Nurse
