Tristram Coffin and Mae Clarke in a publicity photo for the 1949 Republic movie serial, King of the Rocket Men.

Tristram Coffin and Mae Clarke in a publicity photo for the 1949 Republic movie serial, King of the Rocket Men.

Movie poster for “Embers of Evil,” Chapter 12 of the 1943 Columbia Pictures Batman serial.

Movie poster for “Embers of Evil,” Chapter 12 of the 1943 Columbia Pictures Batman serial.

Scene from “The Mark of the Zombies” (Batman 1943 serial, Chapter 3)

Scene from “The Mark of the Zombies” (Batman 1943 serial, Chapter 3)

Poster and title screen from “The Electrical Brain,” the first chapter of the 1943 Columbia Pictures serial Batman.