Sim was a supporting character in Season 3 of Star Trek: Enterprise. Appearing in the episode "Similitude", he was a mimetic simbiot of Commander Charles Tucker III, created by Doctor Phlox using a Lyssarian Desert Larvae. He was created after Tucker was injured and rendered comatose due to an encounter with a spatial anomaly in 2153. Sim's purpose was to provide Phlox with vital brain tissue, which was to be used to treat Tucker's condition. Sim resided aboard Enterprise NX-01, where he lived a lifetime in fifteen days.
Sim was portrayed by Maximillian Kesmodel (apparent age 4), Adam Taylor Gordon (apparent age 8), Shane Sweet (apparent age 17) and Connor Trineer (adult).
History[]
Development[]
Sim's development from a Lyssarian Desert Larvae began with cellular division in a growth tank inside Enterprise NX-01, following insertion of DNA from Tucker. Two days later, Sim had developed into a fetus, which was sensitive to light. He had been transferred to a birthing tank, which was usually covered by a sheet, and the lighting in Enterprise's sickbay was deliberately dimmed. Inside the tank, the fetal Sim was surrounded by a nutrient solution. Phlox expected Sim to be "born" the following day, and believed that once he aged to the approximate age of the real Charles Tucker, the clone could be a donor of the needed tissue and still live out the rest of his short lifespan.
Becoming Tucker[]
After his "birth", Phlox became a surrogate father to him. He named him "Sim" and cared for him as Sim grew quickly to a boy, a teenager and an adult over just a few days. To the surprise (and vague unease) of the crew, as he grew older, Sim 'inherited' all of Trip's memories from that age. Archer informed him of his true existence and purpose and Sim accepted it. As the days went by, Sim became part of the crew, putting Tucker's remembered engineering skills to good use. He even saved Enterprise NX-01 from a polaric field. Sim had strong romantic feelings for T'Pol, but she seemed somewhat discomforted by his advances. Meanwhile, Phlox discovered through further testing that he was incorrect; Sim would not survive the tissue transplant.
Wanting to live[]
Sim discovered that an experimental enzyme might extend his life beyond the fifteen days to the length of a normal human lifespan. Phlox told him that there was no proof that the enzyme would work and the time it would take to determine if it would work would age Sim beyond the point where he could donate the necessary tissues to Tucker, with the result that Tucker would die if Sim was saved or waited too long. Sim thought about stealing a shuttlepod to escape, and went as far as setting up the computer to aid in this escape, but he realized that if he did this, then Tucker would die and the Enterprise's mission to stop the Xindi might fail, causing the annihilation of mankind - not to mention that Sim would have to live the rest of his incredibly short life alone in space, "peeing in bottles" because the shuttlepod was not equipped with restroom facilities. With this in mind, he decided to submit to the operation. T'Pol kissed him goodbye and he reported to sickbay.
Sacrifice[]
Sim was painlessly killed by the operation, and was given a full-honours burial in space by the crew, including the resuscitated Tucker. Archer conducted a funeral service for Sim, noting that the entire crew was grateful for the contributions he made in his short lifetime. Sim was "buried" in a torpedo capsule which was then launched into space.