CHALLENGERS OF THE UNKNOWN CHRONOLOGY Showcase #6 (January-February 1957): "The Secrets of the Sorceror’s Box" Showcase #7 (March-April 1957): "Ultivac Is Loose" Showcase #11 (November-December 1957): "The Day the Earth Blew Up" Showcase #12 (January-February 1958): "The Menace of the Ancient Vials" Challengers of the Unknown Vol. 1 #1 (April-May 1958): "The Man Who Tampered With Infinity" Challengers of the Unknown Vol. 1 #1/2 (April-May 1958): "The Human Pets" Challengers of the Unknown Vol. 1 #2 (June-July 1958): "The Monster Maker" Challengers of the Unknown Vol. 1 #2/2 (June-July 1958): "The Traitorous Challenger" Challengers of the Unknown Vol. 1 #3 (August-September 1958): "The Secret of the Sorcerer’s Mirror" Challengers of the Unknown Vol. 1 #3 (August-September 1958): "The Menace of the Invincible Challenger" Challengers of the Unknown Vol. 1 #4 (October-November 1958): "The Wizard of Time" Challengers of the Unknown Vol. 1 #10/2 (October-November 1959): "The Four Faces of Doom" [Flashback] Challengers of the Unknown Vol. 1 #5 (December 1958-January 1959): "Riddle of the Star-Stone" Justice League of America #144 (July 1977): "The Origin of the Justice League - Minus One" [Flashback] Challengers of the Unknown Vol. 1 #6 (February-March 1959): "Captives of the Space Circus" Challengers of the Unknown Vol. 1 #6/2 (February-March 1959): "The Sorceress of Hidden Valley" Challengers of the Unknown Vol. 1 #7 (April-May 1959): "Isle of No Return" Challengers of the Unknown Vol. 1 #7/2 (April-May 1959): "The Beasts from Planet Nine" Challengers of the Unknown Vol. 1 #8 (June-July 1959): "The Man Who Stole the Future" Challengers of the Unknown Vol. 1 #8/2 (June-July 1959): "The Prisoners of Robot Planet" Challengers of the Unknown Vol. 1 #9 (August-September 1959): "The Men Who Lost Their Memories" Challengers of the Unknown Vol. 1 #9/2 (August-September 1959): "The Plot to Destroy Earth" Challengers of the Unknown Vol. 1 #10 (October-November 1959): "The Cave-Man Beast" Challengers of the Unknown Vol. 1 #10/2 (October-November 1959): "The Four Faces of Doom" Challengers of the Unknown Vol. 1 #11 (December 1959-January 1960): "The Creatures from the Forbidden World" Challengers of the Unknown Vol. 1 #12 (February-March 1960): "The Challenger from Outer Space" Challengers of the Unknown Vol. 1 #12/2 (February-March 1960): "The Three Clues to Sorcery" Challengers of the Unknown Vol. 1 #13 (April-May 1960): "The Prisoner of the Tiny Space Ball" Challengers of the Unknown Vol. 1 #13/2 (April-May 1960): "The Creatures from the Past" Challengers of the Unknown Vol. 1 #14 (June-July 1960): "The Man Who Conquered the Challengers" Challengers of the Unknown Vol. 1 #14/2 (June-July 1960): "Captives of the Alien Beasts" Challengers of the Unknown Vol. 1 #15 (August-September 1960): "The Return of Multi-Man" Challengers of the Unknown Vol. 1 #15/2 (August-September 1960): "The Lady Giant and the Beast" Challengers of the Unknown Vol. 1 #16 (October-November 1960): "The Incredible Metal Creature" Challengers of the Unknown Vol. 1 #16/2 (October-November 1960): "Prisoners of the Mirage World" Challengers of the Unknown Vol. 1 #17 (December 1960-January 1961): "The Genie Who Feared June" Challengers of the Unknown Vol. 1 #17/2 (December 1960-January 1961): "Secret of the Space Capsules" Challengers of the Unknown Vol. 1 #18 (February-March 1961): "The Menace of Mystery Island" Challengers of the Unknown Vol. 1 #18/2 (February-March 1961): "The Doomed World of Tomorrow" Challengers of the Unknown Vol. 1 #19 (April-May 1961): "The Alien Who Stole a Planet" Challengers of the Unknown Vol. 1 #19/2 (April-May 1961): "The Beasts from the Fabulous Gem" Challengers of the Unknown Vol. 1 #20 (June-July 1961): "Multi-Man Strikes Again" Challengers of the Unknown Vol. 1 #20/2 (June-July 1961): "The Cosmic-Powered Creatures" Challengers of the Unknown Vol. 1 #21 (August-September 1961): "The Weird World That Didn’t Exist" Challengers of the Unknown Vol. 1 #21/2 (August-September 1961): "The Challengers’ Space-Pet Ally" Challengers of the Unknown Vol. 1 #22 (October-November 1961): "The Curse of the Golden God" Challengers of the Unknown Vol. 1 #22/2 (October-November 1961): "The Thing in Challenger Mountain" Challengers of the Unknown Vol. 1 #23 (December 1961-January 1962): "Death Guarded the Doom Box" Challengers of the Unknown Vol. 1 #23/2 (December 1961-January 1962): "The Island in the Sky" Challengers of the Unknown Vol. 1 #24 (February-March 1962): "The Challengers Die at Dawn" Challengers of the Unknown Vol. 1 #24/2 (February-March 1962): "Multi-Man, Master of Earth" JLA Year One #02 Challengers of the Unknown Vol. 1 #25 (April-May 1962): "Return of the Invincible Pharaoh" Challengers of the Unknown Vol. 1 #25/2 (April-May 1962): "Captives of the Alien Hunter" Challengers of the Unknown Vol. 1 #26 (June-July 1962): "Death Crowns the Challenger King" Challengers of the Unknown Vol. 1 #26/2 (June-July 1962): "The Secret of the Space Spectaculars" Challengers of the Unknown Vol. 1 #27 (August-September 1962): "The 1,001 Impossible Inventions" Challengers of the Unknown Vol. 1 #27/2 (August-September 1962): "Master of the Volcano Men" Challengers of the Unknown Vol. 1 #28 (October-November 1962): "The Revolt of the Terrible FX-1" Challengers of the Unknown Vol. 1 #28/2 (October-November 1962): "Riddle of the Faceless Man" JLA Year One #11-BTS JLA Year One #12-BTS Challengers of the Unknown Vol. 1 #29 (December 1962-January 1963): "Four Roads to Doomsday" Challengers of the Unknown Vol. 1 #29/2 (December 1962-January 1963): "The War Between the Challenger Teams" Challengers of the Unknown Vol. 1 #30 (February-March 1963): "Multi-Man--Villain Turned Hero" Challengers of the Unknown Vol. 1 #30/2 (February-March 1963): "The Fifth Challenger" Challengers of the Unknown Vol. 1 #31 (April-May 1963): "The Man Who Saved the Challengers’ Lives" Challengers of the Unknown Vol. 1 #32 (June-July 1963): "One Challenger Must Die" Challengers of the Unknown Vol. 1 #32/2 (June-July 1963): "Cosmo Turns Traitor" Challengers of the Unknown Vol. 1 #33 (August-September 1963): "The Challengers Meet Their Master" Challengers of the Unknown Vol. 1 #33/2 (August-September 1963): "The Threat of the Trojan Robot" Challengers of the Unknown Vol. 1 #34 (October-November 1963): "Beachhead, U.S.A." Challengers of the Unknown Vol. 1 #34/2 (October-November 1963): "Multi-Woman, Queen of Disaster" Challengers of the Unknown Vol. 1 #35 (December 1963-January 1964): "War Against the Moon-Beast" Challengers of the Unknown Vol. 1 #35/2 (December 1963-January 1964): "Sons of the Challengers" Challengers of the Unknown Vol. 1 #36 (February-March 1964): "The Giant in Challenger Moonbrain" Challengers of the Unknown Vol. 1 #36/2 (February-March 1964): "Bodyguards to a Star" Challengers of the Unknown Vol. 1 #37 (April-May 1964): "The Triple Terror of Mr. Dimension" Challengers of the Unknown Vol. 1 #37/2 (April-May 1964): "The Last Days of the Challengers" Challengers of the Unknown Vol. 1 #38 (June-July 1964): "The Menace the Challengers Made" Challengers of the Unknown Vol. 1 #38/2 (June-July 1964): "Time Bomb on Holdout Island" Challengers of the Unknown Vol. 1 #39 (August-September 1964): "The Phantom of the Fair" Challengers of the Unknown Vol. 1 #39/2 (August-September 1964): "Rocky, the Genius Challenger" Challengers of the Unknown Vol. 1 #40 (October-November 1964): "The Super Powers of the Challengers" Challengers of the Unknown Vol. 1 #40/2 (October-November 1964): "The Spy in Challenger Cave" Challengers of the Unknown Vol. 1 #41 (December 1964-January 1965): "The Challenger Who Quit" Challengers of the Unknown Vol. 1 #41/2 (December 1964-January 1965): "Two Hours to Die" Challengers of the Unknown Vol. 1 #42 (February-March 1965): "The League of Challenger-Haters" Challengers of the Unknown Vol. 1 #42/2 (February-March 1965): "The Secret of the Masked Challenger" Challengers of the Unknown Vol. 1 #43 (April-May 1965): "Four Against Monstro" Challengers of the Unknown Vol. 1 #44/2 (June-July 1965): "Ace--the Challenger Who Went Bad" Challengers of the Unknown Vol. 1 #47/2 (December 1965-January 1966): "The Terrors of Mr. Tic-Tac-Toe" Challengers of the Unknown Vol. 1 #43/2 (April-May 1965): "The Haunted Island" Challengers of the Unknown Vol. 1 #44 (June-July 1965): "The Curse of the Evil Eye" Challengers of the Unknown Vol. 1 #45 (August-September 1965): "The Queen of the Challenger-Haters" Challengers of the Unknown Vol. 1 #46 (October-November 1965): "The Strange Schemes of the Gargoyle" Challengers of the Unknown Vol. 1 #46/2 (October-November 1965): "The Best Challenger Wins" Challengers of the Unknown Vol. 1 #47 (December 1965-January 1966): "The Sinister Sponge" Challengers of the Unknown Vol. 1 #48 (February-March 1966): "Twilight of the Challengers" Doom Patrol Vol. 1 #102 (March 1966): "8 Against Eternity" Challengers of the Unknown Vol. 1 #49 (April-May 1966): "The Tyrant Who Owned the World" Challengers of the Unknown Vol. 1 #50 (June-July 1966): "Final Hour for the Challengers" Challengers of the Unknown Vol. 1 #51 (August-September 1966): "Smash the Sponge Man--Or Die" Challengers of the Unknown Vol. 1 #52 (October-November 1966): "Two Are Dead--Two To Go" Challengers of the Unknown Vol. 1 #53 (December 1966-January 1967): "Who Is the Traitor Among Us?" Challengers of the Unknown Vol. 1 #54 (February-March 1967): "War of the Sub-Humans" Challengers of the Unknown Vol. 1 #55 (April-May 1967): "Taps for Red" Challengers of the Unknown Vol. 1 #56 (June-July 1967): "License to Kill" Challengers of the Unknown Vol. 1 #57 (August-September 1967): "The Kook and the Kilowatt Killer" Challenger...
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