Doctor Thalleus Tharn was a highly-decorated Bith scholar, brain surgeon, and xenopsychiatrist, who served as the chairman of xenopsychiatric medicine at the Greater Coruscant University. In 44 ABY, during the government-sanctioned siege of the Jedi Temple, Doctor Tharn's professional opinion was consulted by Galactic Alliance Chief of State Natasi Daala for the determination of the mental status of two Jedi Knights, Sothais Saar and Turi Altamik, both of whom had recently suffered from and been cured of a Force-induced psychosis. Through a preliminary field examination, Doctor Tharn attested to the restored cognitive stability of both Saar and Altamik, which ultimately prompted Chief Daala to lift the Temple siege.