The Outer Limits: Descent

A mild mannered, picked-on professor injects himself with some dominant genes extracted from homo erectus in the hope of becoming an alpha male. However things don't go to plan as when his body becomes more powerful, his temper flies out of control, his intelligence diminishes and he starts trying to make others intimidated. His only hope lies in a grad. student who may be able to reverse the situation, but will he want to return to his previous, intimidated self?