I'm an avid fan of the Cthulhu Mythos literature developed by H.P. Lovecraft and expanded on by various other authors across the decades, and I've recently been looking at how it might have influenced some aspects of the Trekverse. One story that I think draws quite heavily on Lovecraft is TOS "What Are Little Girls Made Of?" It has a number of similarities with Lovecraft's Mythos novella At the Mountains of Madness: Both take place largely in vast cave systems located underneath frozen wildernesses that house the remnants of an ancient civilization, and both refer to a race of "Old Ones" who were ultimately destroyed by their artificially-created servants - In AtMoM, the Shoggoths, in WALGMO, Ruk and his fellow androids. Has anyone else ever noticed this? It's not really too surprising when one considers that the episode was written by Robert Bloch, who had been a friend of Lovecraft's and had written a number of Cthulhu Mythos tales himself. Are there any other elements of Lovecraft in Trek?