The hand signal actually made its first appearance in the Season 2 opener, "Amok Time," in which Spock ultimately learned his fiancé, T'Pring, had found another lover. The moment in the episode ...

Spock, using his levitation boots, hovers mid-air near Kirk, and they indulge in light-hearted banter when Kirk’s hand slips, and he begins to fall. In a dramatic moment, Spock saves Kirk’s ...