I come to you today not as a super-hero, but a man! A man who is suffering from a fatal illness that will claim his life in the next 24 hours unless something drastic is done! My one hope of survival rests with you, the citizens of Metropolis! I ask for able-bodied volunteers to donate a small amount of his or her blood so that I can give myself a super-transfusion! I can't promise that your blood will cure me! But if I do survive, I shall be eternally grateful... And continue to defend you from any and all threats! My life rests in your hearts! 
- — Superman
Action Comics #403 is an issue of the series Action Comics (Volume 1) with a cover date of August, 1971. It was published on June 29, 1971.
Synopsis for Superman: "Attack of the Micro-Murderer"
Superman's body is invaded by a Zohtt, a magical wraith-being which attempts to destroy him, and not even a blood transfusion from most of Metropolis' citizens can save him.
Appearing in Superman: "Attack of the Micro-Murderer"
Featured Characters:
Supporting Characters:
Antagonists"
- A Zohtt (Single appearance)
Synopsis for Superman: "The Man With the X-Ray Mind"
Superman learns that a Metropolis University janitor has psychic powers, including precognition, the ability to predict the future -- and that the janitor knows that he is Clark Kent.
Appearing in Superman: "The Man With the X-Ray Mind"
Featured Characters:
Supporting Characters:
- Mr. Lundgren (Single appearance)
Other Characters:
- Prof Borwin (Single appearance)
Locations:
Synopsis for Vigilante: "The Impossible Legend"
This story is reprinted from Action Comics #176.
Appearing in Vigilante: "The Impossible Legend"
Featured Characters:
Supporting Characters:
Antagonists:
- Benton Gang
Other Characters:
- Deputies Blake, Carter and Wright
Locations:
- Red Valley Junction
Vehicles:
Synopsis for Superboy: "When Krypto Was Superboy's Master"
This story is reprinted from Adventure Comics #310.
When a colleague questions Professor Lang's translation of an inscription on a globe which is said to be able to magically exchange minds, Superboy pretends that he and Krypto have had their minds switched in order to teach the cynic a lesson.
Appearing in Superboy: "When Krypto Was Superboy's Master"
Featured Characters:
Supporting Characters:
Other Characters:
- Dr. Keighley (Single appearance)
Locations:
Notes
- Published by National Periodical Publications, Inc.
- Superman appeared last in Superman #238. He appears next in Adventure Comics #406.
See Also
Recommended Reading
- Superman Family Recommended Reading
- Action Comics (Volume 1)
- Adventure Comics (Volume 1)
- DC Comics Presents (Volume 1)
- Superboy (Volume 1)
- Superboy (Volume 2)
- Supergirl (Volume 1)
- Supergirl (Volume 2)
- Superman (Volume 1)
- Superman Family (Volume 1)
- Superman's Girl Friend, Lois Lane (Volume 1)
- Superman's Pal, Jimmy Olsen (Volume 1)
- World's Finest (Volume 1)