Star Trek: The Next Generation (1987)
S3E23 Sarek
Episode Overview
Stardate: 43917.4. Sarek, Spock's father from Vulcan, arrives on the Enterprise to engage in diplomatic discussions with the Legaran. Unfortunately, he is afflicted with Bendii syndrome, a condition that leads Vulcans to increasingly struggle with emotional regulation, causing overwhelming feelings to surface.
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S3