He finds his lab window smashed and room wrecked .
At home in California 's High Sierras , Prof. Clifford Groves ( Robert Shayne ) hears glass breaking and looks up in fear from his book , Neanderthal Man and the Stone Age .
Clifford Groves finds Clifford Groves ' lab window smashed and room wrecked .
At home in California 's High Sierras , Prof. Clifford Groves ( Robert Shayne ) hears glass breaking and looks up in fear from his book , Neanderthal Man and the Stone Age .