We had Kirk as a "ghost" in Tholian Web, Satan in TAS, a salt vampire, and even Jack the Ripper in Wolf in the Fold. But Catspaw was the only Trek salute to Halloween in any of the series, so far as I can tell.
Short of Spock mind-melding with a Jack-o-lantern, what's your spookiest TOS or TAS episode?
Short of Spock mind-melding with a Jack-o-lantern, what's your spookiest TOS or TAS episode?