Brain Drain, TOS: S2E20 “Return to Tomorrow”

Kirk and Spock seem to have no shortage of mind-altering adventures, which is reasonable considering one of the final frontiers still beyond our understanding is the mind.  If space offers anomalies and aggressive aliens, the human body provides complex mystery and questionable theories.  Brushing up against this frontier, Kirk, Spock, and Lt. Cmdr. Mulhall respond … More Brain Drain, TOS: S2E20 “Return to Tomorrow”