The Innocent Prey - S1.E10

A prison craft from Earth's future crash lands in the area where the travelers are resting, releasing two prisoners, a convicted murderer and a thief, into a community of stranded humanoid aliens that does not comprehend violence or the concept of doors and locks. With a killer on the loose scheming to abscond with an orb that gives the aliens psychokinetic powers, Varian and the others must deal with him and protect the pacifists.