What Are Little Girls Made Of?

"**What Are Little Girls Made Of?**"
"What Are Little Girls Made Of?"
Star Trek: The Original Series episode
Episode no.	Season 1; Episode 7
Directed by	James Goldstone
Written by	Robert Bloch
Featured music	Fred Steiner
Cinematography by	Jerry Finnerman
Production code	10
Original air date	October 20, 1966
Guest appearances
	Michael Strong as Dr. Roger Korby; Sherry Jackson as Andrea; Ted Cassidy as Ruk; Harry Basch as Dr. Brown; Vince Deadrick as Security Guard Mathews; Budd Albright as Security Guard Rayburn;
Episode chronology
← Previous; "Mudd's Women"	Next →; "Miri"
	Star Trek: The Original Series season 1
	List of episodes

"What Are Little Girls Made Of?" is the seventh episode of the first season of the American science fiction television series, Star Trek. Written by Robert Bloch and directed by James Goldstone, it first aired on October 20, 1966.

In the episode, Nurse Chapel searches for her long lost fiancé and uncovers his secret plan to create sophisticated androids for galactic conquest.

The first episode of the series to be repeated on NBC, the title of the episode is taken from the fourth line of the 19th-century nursery rhyme, "What Are Little Boys Made Of?"