Continuity mistake: Galen's left hand is above shoulder height and grasping one of the cage's bars as he speaks with Virdon and Burke in the cage. The view of Galen from Burke and Virdon has Galen's hand below his waist.
Continuity mistake: When Galen, Burke, and Virdon enter the village, Gregor's hands are far apart grasping the bars of the prison cart as they pass. Quick cut back to Gregor and his hands are closer together, holding bars that are next to each other.
Continuity mistake: Virdon's head is lying on a pillow looking at Dr. Kira and turns it to his left shoulder as Dr. Kira speaks, but a quick shot back to Virdon and his head is looking at Dr. Kira again.
In the early 1990's, Roddy McDowall (Galen) was asked what happened to Burke and Virdon after the series ended, as it was abruptly canceled. He replied they found a rocket ship ship, took off, and went back to their own Earth and time.