Star Trek: The Next Generation

Season 3, Episode 23

Episode Title: Sarek

Air Date: 1990-05-14

Overview:

Stardate: 43917.4. Spock's Vulcan father, Sarek, boards the Enterprise to negotiate political relations with the Legaran. However, Sarek has contract Bendii syndrome, which causes a Vulcan to gradually lose control, and become overpowered with emotions.