Jillian Rhade is Telemachus Rhade's wife, seen only in the series' finale. She is the reason he elects to stay behind on Tarazed, to conduct what he acknowledges will be a futile last stand against the Magog. Jillian appears to be Rhade's only wife, and that fact does not seem to cause him any concern with regard to his manhood, or status as a Nietzschean. According to Rhade's statement at the end of the final episode, Jillian and their family are safe and survive the assault on Tarazed. ("The Heart of the Journey (Part 1)", "The Heart of the Journey (Part 2)")
Jillian is played by Cobie Smulders.