American actor who played the rapidly ageing Spock as a seventeen-year-old undergoing pon farr on the Genesis planet in Star Trek III: The Search for Spock.
Stephen Manley is an American actor who worked from childhood in television, with guest parts in many series of the 1970s and 1980s.
In Star Trek III: The Search for Spock (1984) he played Spock at about seventeen, one of the stages of the reborn Vulcan's accelerated growth. This is the version of the character who suffers the fever of pon farr while held with Saavik in the Klingons' custody, and whom she guides through it in one of the film's quietest scenes.
Manley was followed in the part by Joe W. Davis as the adult Spock, before Leonard Nimoy takes over for the closing scenes on Vulcan.