Airdate: December 15, 1967
48 or 80 produced
42 of 80 aired
Introduction
On a planetary survey for the rare and ultra-strong substance Tritanium, Kirk encounters a memory from his past - a deadly memory. Will the mysterious creature he encounters be stopped, and will Kirk keep his composure, not to mention his command, in the attempt?
Garrovick: Captain, do you smell something?
Kirk: (Chuckles nervously)
