HT.078 The Lights of Zetar (TOS)

When Shari Lewis puts down her puppets, the Enterprise bumps into a corporeal life form who just want to be where the people are so much that they’re killing everyone in their path to find some bodies. Did they kill the Zetarians or are they just off terrorizing more people? Did Scotty’s new love just get dropped off at the library never to be seen again?