Vulcan diplomat and Spock's father, struggles with emotional duty and family ties.
Sarek provides the crucial information about Spock's katra that drives the plot.
Sarek meets with Kirk about his son's death and explains that Spock transferred his katra to McCoy.
Sarek identifies McCoy's condition as critical due to holding Spock's katra.
Sarek explains that without help, McCoy will die from carrying the katra, necessitating the reunion procedure.
Explore the full interactive character relationship map of Star Trek III: The Search for Spock
Related entry on Wikidata (Q2712069), public domain (CC0).