Marcus Vasquez (5 episodes)
Moses Hakim (5 episodes)
Joseph Mueller (5 episodes)
Dr. Harper / Paul Johnson / Dr. O'Riely (5 episodes)
Captain Martin / Alexi Dmitriov / Dr. Cravitz (4 episodes)
Jezidrow (3 episodes)
Dr. Myers / Alex Dmitrov (3 episodes)
Sgt. Gantz / Longshanks (3 episodes)
Erin Rice (2 episodes)
LongFu (2 episodes)
Charles Amos (2 episodes)
Maggie Rice (1 episode)