A scientist develops a formula which will cause animals to regress to the form of their primitive ancestors, and tries it on himself with disastrous results.
A scientist develops a formula which will cause animals to regress to the form of their primitive ancestors, and tries it on himself with disastrous results.
Robert Shayne , Richard Crane , Doris Merrick
Walter Koestler
Global Productions ,
as Prof. Clifford Groves
as Dr. Ross Harkness
