Regular Series · Marvel Comics Worlds Unknown (1973) Roy Thomas, John Romita, Gil Kane 8 issues Issues #1 · The Coming of the Martians! Feb 6, 1973 #2 · A Gun for Dinosaur! Apr 3, 1973 #3 · Farewell to the Master! Jun 5, 1973 #4 · Arena Jul 31, 1973 #5 · Black Destroyer! Oct 30, 1973
