Thak was a Gorn physician in the 23rd century. In 2282 Thak was assigned to Gorn outpost on a class M planetoid that the Gorn used to train young warriors. In that year a Federation shuttlecraft crashed on the planet and the outpost's commander had Thak join a rescue party to render aid to the survivors. In the shuttle the Starfleet physician, Doctor Bianca Wilder, attempted to treat Thak's wounds, running his equipment through the universal translator to try and find a suitable treatment for his alien physiology.