"What Are Little Girls Made Of?" cannot disguise a groundbreaking episode behind a long and obscure title. This, the best of the Robert Bloch episodes, tackles a mind-expanding subject head on with one of science fiction's earliest warnings about "uploading." It's odd to watch a story about mechanical life and not enjoy commentary from either Scotty or McCoy, but their conspicuous absence is replaced with some of the series' memorable characters and famous scenes. This is a tragedy on many levels, not the least of which is the establishment of Chapel as consistently lovelorn ("Did you?").

Enterprise makes the third attempt to locate Korby, hinting at the importance of the man or estimation of his finds. Guest star Michael Strong admirably catches every aspect of the "Pasteur of archeological medicine" all the way from human to android to not-quite-sure. The dramatic reappearance of Dr. Korby and equally dramatic (if plot-spun) presence of his fiancé makes one wonder if he avoided the first two, if they were incompetent, or perhaps he was biding his time until a suitable ship came along. Certainly biding time would be less unpleasant with beautimus Sherry Jackson's Andrea, obviously though to serve (in her outrageously eye-popping outfit) than to protect. But then again, she's not programmed for that now is she?

And what does not rock about Ruk? The incomparable Ted Cassidy established Ruk as Trek's most "complex" android generations before Soong and/or Flint, legacy of the "Old Ones" left tending machines across forgotten centuries until sadly brought down by (ironically) Kirk's own hand phaser. Ruk remembers the "equation," the understanding that survival must cancel out programming (or as phrased by Kirk, "You can't protect someone who's trying to destroy you"). Korby did indeed bring the evil back, but perhaps the Exo III equipment can only be operated by Ruk and dies with him. If only he could have explained why the duplicator needs to spin!

There's almost too many good points to list, from respectable split-screen work to the chilling "Androids don't eat," from the reminiscent "Frankenstein" scenes with Andrea and Ruk (and flashing lights if not lightning!) to the hastily conceived but effective "half-breed" insult that tips off Spock. Using uploaded androids as a means to practical immortality is hastily examined in "I Mudd" but here anchors the plot. There is some human left after all in the Korby upload (since he does hand the weapon over to Kirk) but it's clear this Utopian warning is not about sugar and spice and everything nice.