PROFESSOR ZACKRO

Strange Adventures #9"The Origin Of Captain Comet"

Earliest catalogued appearances of Captain Comet and Professor Zackro.

Jun 1951

No listings

Strange Adventures #10"The Air Bandits From Space"

Jul 1951

No listings

Strange Adventures #11"The Day The Past Came Back"

Aug 1951

No listings

Strange Adventures #13"When The Earth Was Kidnaped / The Man Who Televised Time!"

Oct 1951

No listings

Strange Adventures #15"Captain Comet -- Enemy Of Earth"

Dec 1951

No listings

Strange Adventures #16"The Ghost Of Captain Comet / The Secret Of Easter Island / The Touch Of Death"

Jan 1952

No listings

Strange Adventures #17"Beware the Synthetic Men"

Feb 1952

No listings

Strange Adventures #18"The World of Flying Men"

Mar 1952

No listings

Strange Adventures #20"Smugglers of Space / The Man Who Mastered Time / Slaves of the Sea-master"

May 1952

No listings

Strange Adventures #21"Eyes of Other Worlds / The Genius Epidemic / The Monster That Fished for Men / The Boy Who Changed the Future"

Jun 1952

No listings

Strange Adventures #23"Meet Your Masters -- The Ants! / The Last Woman On Earth! / The Ghost Planet / The Brain-Pirates Of Planet X!"

Aug 1952

No listings

Strange Adventures #25

Oct 1952

No listings

Strange Adventures #26

Nov 1952

No listings

Strange Adventures #27

Dec 1952

No listings

Strange Adventures #28

Jan 1953

No listings

Strange Adventures #29

Feb 1953

No listings

Strange Adventures #30

Mar 1953

No listings

Strange Adventures #34"The Lady or the Tiger-Man"

Jul 1953

No listings

Strange Adventures #36"The Grab Bag Planet"

Sep 1953

No listings

Strange Adventures #38"The Seeing Eye Humans"

Nov 1953

No listings

Strange Adventures #40"The Mind Monster"

Jan 1954

No listings

Strange Adventures #41"The Beast From Out of Time"

Feb 1954

No listings

Strange Adventures #42"The Planet of Ancient Children"

Mar 1954

No listings

Strange Adventures #43"The Phantom Prize Fighter"

Apr 1954

No listings

DC Super Stars #6

Aug 1976

No listings

Secret Origins Annual #1

Dec 1987

No listings

Action Comics #0

Nov 2012

No listings