Trog (1970)

"From a million years back...Horror explodes into today!"
TMDb Score

Anthropologist Dr. Brockton unearths a primitive troglodyte -- an Ice Age "missing link": half-caveman, half-ape -- in a local cave. Through medical experimentation, she manages to communicate with him and domesticate him before he's let loose by an irate land developer and goes on a rampage, terrorizing the local citizenry.

Joan Crawfordas Dr. Brockton
Michael Goughas Sam Murdock
Bernard Kayas Inspector Greenham