He was born in 2164 and became a Vulcan ambassador, and father both of Sybok and, more famously, of Spock. He was married three times, firstly to Sybok's mother, a Vulcan princess, secondly to Spock's mother, a human called Amanda Grayson, and finally to another human, Perrin.
In the episode "Sarek", set in 2366, he was discovered to have Bendai's syndrome, an incurable and infectious disease of the mind that resulted in him being uanble to control his emotions. He died during the events of "Unification" in 2368.
Sarek appeared in the following episodes and films: