Doctor Thelex was the Andorian chief of dentistry on board starbase Vanguard in the 2260s. He was gruff and wore octagonal-frame glasses.

In 2265, Dr. Thelex treated Tim Pennington in Vanguard Hospital after Cervantes Quinn broke two of the reporter's teeth in a brief bar fight. Pennington didn't appreciate Thelex's blunt sense of humour. (VAN novel: Harbinger)

Starbase 47-Vanguard personnel

Ballard • Beyer • Braun • Cannella • Charles • Collig • Cooper • Desai • Dunbar • Farber • Finneran • Fisher • jav Gek • Gianetti • Goldrosen • Greenfield • Heffron • Hetzlein • Hofstadter • Holmgren • Humberg • Jackson • Kiraar • Knight • Koothrappali • Langlois • Lenger • Liverakos • Malhotra • Marcus • M'Benga • Medeira • Meeker • Miller • Moyer • Mugavero • ch'Nayla • Nogura • Pimental • Reyes • Robles • Seklir • Shepherd • th'Shoras • Sohl • Sozlok • Strout • Tamishiro • Tarcoh • Tescar • Thelex • T'Prynn • Vumelko • Wallingford • Wolowitz • Xiong