*Star Trek: The Original Series* had titles for each episode. (e.g. - “Amok Time,” “Balance of Terror,” “The Doomsday Machine,” and so forth.)

*Doctor Who* episodes had titles as far back as 1963. (e.g. - “The Daleks,” “Marco Polo,” “An Unearthly Child,” and so forth.)

The original *Twilight Zone* episodes from 1959 through 1964 had titles for each episode. (e.g. - “It's a Good Life,” “Escape Clause,” “The Fever,” and so forth.)

What was the first sci-fi TV series to feature specific titles for each episode?