This DVD contains two wildly divergent episodes, in terms of the series' external continuity. "What Are Little Girls Made Of" was a rare episode that focused on the character of nurse Christine Chapel (Majel Barrett) -- whose past is central to the plot, which involves her long-lost fiance (Michael Strong), presumed dead, who turns up marooned on an alien world, where he is bent on populating the galaxy with the android technology that he found on the planet. The story isn't much more sophisticated than a handful of episodes of Voyage to the Bottom of the Sea built on the same notion, but this is an unusual show from one standpoint -- for the only time in the series, the character of Dr. McCoy doesn't appear at all, and Leonard Nimoy's Mr. Spock is also absent for about two-thirds of the program. "Dagger of the Mind" is also about a scientist (James Gregory) living in an isolated environment who develops some strange ideas about how to treat people -- instead of helping them with the equipment at his remote penal colony, the man is experimenting on their minds and destroying them in the process. It features Nimoy rather more prominently, and introduces the Vulcan telepathic mind-meld, which would become an essential device in many subsequent episodes. Morgan Woodward nearly steals the episode, however, with his performance as a stricken victim of the doctor's misguided experiments. The film-to-video transfer on "What Are Little Girls Made Of" is beautiful -- much of the episode takes place in the artificial, constricted environment of a network of underground caverns, and the image balances a natural darkness with muted color tones and enough richness to hold the eye. "Dagger of the Mind" is set in the more familiar surroundings of the Enterprise and a similarly designed planetary establishment, although a lot of the latter is shrouded in darkness. It's a good transfer of an episode in which the atmosphere is more essential than the effects.