Sebastian Photon appears only in the original TimeSplitters, as one of the nine males, and eighteen core Story protagonists. He is a space-traveller, who visited Planet X in the year 2020. He wears futuristic-looking clothing with a light blue and cream colour scheme.
Sebastian Photon, alongside partner Angel Perez, was sent to Planet X on a mission to retrieve a stolen cyberbrain. He and Angel fought their way through the canyons before discovering the aliens' headquarters, where the cyberbrain was held. After taking out the aliens, they retrieved the brain and then proceeded to the beam up coordinates.