American author (1917–1994), best known for the novel Psycho, who wrote three horror-tinged episodes of the original series: What Are Little Girls Made Of?, Catspaw and Wolf in the Fold.
Robert Bloch was an American writer of horror, crime and fantasy fiction, born in 1917. His novel Psycho was the basis of Alfred Hitchcock's film.
He wrote three episodes of the original Star Trek. What Are Little Girls Made Of? (1966) concerns Dr. Roger Korby and the android-making machinery left behind by a vanished race. Catspaw (1967), the series' Halloween story, pits the crew against the alien illusionists Korob and Sylvia. Wolf in the Fold (1967) reveals that Jack the Ripper was an immortal, fear-eating entity, an idea Bloch developed from one of his own short stories.
All three bring a Gothic flavour to the series, with castles, doubles and ancient evils set against the Enterprise crew's rationalism. Bloch died in 1994.