Issue: #12
The Captive PlanetBeyond our solar system, the strange planet loomed -- a planet whose people were in bondage, doomed to extinction unless they had help! Then help came, from a gallant band of earthmen, led by Batman and Robin -- and thus began the heroic fight for survival and freedom on... The Captive PlanetThe Caveman BatmanFrom out of the prehistoric ages, when cavemen and mighty mammoths live...
First appearances: Phorbus, Jim Rolfe, Harvey Baxter, Rakk, Rog the Tiger-Man, Arko, Gurney, Paul Cole, Edith Todd, Thersus, Chief Warra, Borr, William Sayre
Creators: Bill Finger, Sheldon Moldoff, Stan Kaye, Charles Paris, Winslow Mortimer, Jack Burnley, Dick Sprang, Jack Schiff, Edmond Hamilton
Characters: Batman, Dick Grayson, Superman, James Gordon, Lois Lane, Perry White, Phorbus, Jim Rolfe, Harvey Baxter, Rakk, Signalman, Professor Carter Nichols, Kraak, John Todd, Rog the Tiger-Man, Arko, Gurney, Paul Cole, Edith Todd, Thersus