#1#1#2#2#3#3#4 - 'The Wizard of Time'
#5 - 'The Riddle of the Star-Stone'
#6#6#7#7#8#8#9#9#10#10#11 - 'The Creatures from the Forbidden World'
#12#12#13#13#14#14#15#15#16#16#17#17#18 - 'The Doomed World of Tomorrow!'
#19 - 'The Beasts from the Fabulous Gem'
#20 - 'The Cosmic-Powered Creatures'
#21 - 'The Challengers' Space-Pet Ally'
#22 - 'The Thing In Challenger Mountain!'
#22 - 'The Thing In Challenger Mountain!'
#23 - 'The Island in the Sky'
#24 - 'Multi-man, Master of Earth'
#25 - 'Captives of the Alien Hunter'
#26 - 'Secret of the Space Spectaculars'
#27 - 'Master of the Volcano Men'
#28 - 'The Riddle of the Faceless Man'
#29 - 'War Between the Challenger Teams'
#30 - 'Multi-man -- Villain Turned Hero'
#31 - 'The Man Who Saved the Challengers' Lives'
#32 - 'One Challenger Must Die!'
#32 - 'One Challenger Must Die!'
#32 - 'One Challenger Must Die!'
#33 - 'The Challengers Meet Their Master!'
#33 - 'The Challengers Meet Their Master!'
#35 - 'War Against the Moon-Beast'
#36 - 'The Giant in Challenger Mountain'
#38 - 'The Menace the Challengers Made'
#39 - 'Rocky, the Genium Challenger!'
#39 - 'Rocky, the Genium Challenger!'
#40#40#41 - 'The Challenger Who Quit'
#42 - 'The League of Challenger-Hater's'
#43 - 'The Haunted Island!'
#43 - 'The Haunted Island!'
#44 - 'Curse Of The Evil Eye!'
#44 - 'Curse Of The Evil Eye!'
#45 - 'Queen of the Challenger-Haters'
#46 - 'The Strange Schemes of the Gargoyle'
#47 - 'The Sinister Sponge-Man'
#48 - 'Twilight Of The Challengers!'
#49 - 'The Tyrant Who Owned the World!'
#50 - 'Final Hour for the Challengers!'
#51 - 'Smash the Sponge Man -- or Die'
#52 - 'Two Are Dead..Two To Go!'
#53 - 'Who is the Traitor Among Us?'
#54 - 'War of the Sub-Humans!'
#55 - 'Taps for Red'
#56 - 'License To Kill!'
#57 - 'Tino, the Terrible Teen, Returns in . . . The Kook and the Kilowatt Killer!'
#58 - 'Live Till Tomorrow?'
#59 - 'The Petrified Giant'
#60 - 'The Thing that Could Not Die!'
#60 - 'The Thing that Could Not Die!'
#62 - 'The Legion Of The Weird!'
#62 - 'The Legion Of The Weird!'
#63 - 'None Shall Escape the Walking Evil'
#64 - 'Invitation To A Hanging!'
#64 - 'Invitation To A Hanging!'
#65 - 'The Devil's Circus'
#65 - 'The Devil's Circus'
#66 - 'Rendezvous With Revenge!'
#67 - 'The Dream Killers!'
#67 - 'The Dream Killers!'
#68 - 'One of us is a Madman!'
#69 - 'The Secret of Skull Mountain'
#70 - 'A Scream of Yesterdays'
#71 - 'When Evil Calls!'
#72 - 'A Plague Of Darkness'
#73 - 'The Curse Of The Killer Time Forgot!'
#74 - 'To Call a Deadman'
#75 - 'Ultivac is Loose!'
#76 - 'The Traitorous Challenger'
#76 - 'The Traitorous Challenger'
#78#78#78#79#79#80#81 - 'Multi-Man's Master Plan'
#82 - 'The Lurker Below'
#83 - 'Seven Doorways To Destiny'
#84 - 'To Save A Monster'
#85 - 'The Creature From The End Of Time'
#86 - 'The War At Times End'
#87 - 'Twelve Million Years to Twilight'
TPB - 'Stolen Moments, Borrowed Time'
#1 - 'Stolen Moments, Borrowed Time'
#2 - 'Stolen Moments, Borrowed Time, Part Two'
#3 - 'Stolen Moments, Borrowed Time, Part Three'
#4 - 'Stolen Moments, Borrowed Time, Part Four'
#5 - 'Stolen Moments, Borrowed Time, Part Five'
#6 - 'Stolen Moments, Borrowed Time, Part Six'