From Star Trek: Ancient Vulcan ritual, also called the re-fusion, intended to reunite an individual's katra (living spirit) to that person's body. Until 2285, the ceremony had not been performed for centuries, since in most cases a Vulcan's katra is returned home after the dead of the body. Sarek requested the fal-tor-pan for his sun. Spock, whose body had been regenerated at the Genisis Planet following his death there in 2285.

High priestess T'Lar noted that the fal-tor-pan had not been attempted since "ages past", and then only in legend. Nevertheless, the ritual was successfull in reuniting Spock's body and soul.