Men into Space - Season 1 Episode 28 Voice of Infinity
Overview: Space station Astra is chosen for a medical experiment to measure men's reactions to stress and fatigue. The medical director is convinced he can quantify a person's reactions to strain and so prevent accidents. Then a life-threatening problem on the space station requires men to perform well beyond their limits. An inner "voice of infinity" is what they heard, enabling them to save the situation.