Professor Groves, an expert in prehistoric life, proves his theories with an extract that'll regress a cat to a saber-tooth tiger and man to a Neanderthal.

Starring:

Robert Shayne, Joyce Terry, Richard Crane, Doris Merrick, Beverly Garland, Robert Long, Tandra Quinn, Lee Morgan, Eric Colmar, Dick Rich, Robert Easton, Frank Gerstle, Anthony Jochim, Marshall Bradford, William Fawcett

Genre:

Horror, Sci-Fi