Lost in Space (1965)

S2E17 The Questing Beast

Will and Dr. Smith encounter a knight on a mission to hunt down the creature known as Gundemar. Meanwhile, Penny crosses paths with Gundemar and forms a bond with her. Will takes on the role of the knight's pageboy. As it becomes clear that the beast is actually a woman, the knight grapples with his dilemma about whether he can still go through with the kill, prompting him to reflect on his future and purpose.