Doctor Fredrick was a Terran Dominion doctor who defected to the Dominion Renegades under Valerian Mengsk. Fredrick did research on the uninfested Sarah Kerrigan and helped care for her. After Doctor Emil Narud was not permitted to do research on Kerrigan, Valerian Mengsk forwarded Fredrick's research to Narud.[1]


  1. Golden, Christie (November 6, 2012). StarCraft II: Flashpoint. Simon & Schuster (Gallery Books). ISBN 978-1451-65962-7.