My secret identity has outlived its usefulness! I've decided I won't limit myself to only one alter ego all my life like dad and granddad have! Instead Superman-III will be a super-hero with multiple identities! 
Superman #354 is an issue of the series Superman (Volume 1) with a cover date of December, 1980. It was published on September 11, 1980.
Synopsis for "Superman: Twice Upon a Time!"
A man from another world comes to Earth in search of his lost sweetheart, but a villain named Mr. Alpha captures the girl he thinks he is looking for and forces him to battle Superman.
Appearing in "Superman: Twice Upon a Time!"
Featured Characters:
- Template:Apn
Supporting Characters:
- Inspector Henderson (Mentioned only)
Antagonists:
- Three Jewelry Thieves (Unnamed) (Single appearance)
- Mr. Alpha (Single appearance)
Other Characters:
- Museum Receptionist (Unnamed) (Cameo) (Single appearance)
- George (Mentioned only)
- Susan Stanyon (Single appearance)
- Nurse (Unnamed) (Single appearance)
- Metropolis Police Department
- Tontrian (pre-historic Earth race)
- Dr. Thalia Tate (Original name was Myyla) (Single appearance) (Flashback and main story)
- Rodru (Single appearance) (Flashback and main story)
Locations:
- 1930 (Flashback only)
- 1980
- United States of America
- New York
- Gloversville
- Gloversville General Hospital
- Gloversville
- Metropolis
- Sewer System
- Metropolis Museum
- Susan Stanyon's Apartment
- New York
- United States of America
- Prehistoric Era
Items:
- Rocket Jet Gear
- Daily Planet Newspaper (Mentioned only)
- Time Travelling Suits
- Lingua-Disc
Vehicles:
Concepts:
Synopsis for "Superman 2020: The Debut of Superman III!"
In the 21st Century, the first two Supermen plan to ceremoniously pass on the "S" shield to Superman III, son of the second Superman, just as Superman III "kills off" his secret identity in favor of adopting several other secret identities and a racist group plans to destroy all three Supermen and the floating city of New Metropolis.
Appearing in "Superman 2020: The Debut of Superman III!"
Featured Characters:
- Superman III (First appearance) (Flashback and main story)
- Kalel Kent (Dies)
Supporting Characters:
- Superman I (First appearance) (Flashback and main story)
- Mrs. Kent (First appearance; unnamed) (Cameo) (Flashback only)
- Kara Kent (Mentioned only) (Superman I's daughter)
- Kalel Kent (Mentioned only) (Superman I's son)
- Superman II (First appearance) (Flashback and main story)
- Mrs. Kent (First appearance; unnamed) (Cameo) (Flashback only)
Antagonists:
- Purists (First appearance)
- Leader (First appearance; unnamed)
Other Characters:
- Citizens of New Metropolis (First appearance)
- Professor? (Unnamed) (Single appearance)
- Priest (Unnamed) (Cameo) (Flashback only)
Locations:
- 2020
- Earth-2020 (First appearance)
- Space
- Solar System (Mentioned only)
- New Metropolis (First appearance)
- Earth
- United States of America
- Megalopolis (conists of Boston, New York City, Philadelphia, Metropolis, Gotham City & Baltimore)
- Quadrant E-65
- Domicile Qube A51
- Quadrant E-65
- Boston (Mentioned only)
- New York City (Mentioned only)
- Philadelphia (Mentioned only)
- Metropolis (Mentioned only)
- Gotham City (Mentioned only)
- Baltimore (Mentioned only)
- Midwest America (Unnamed)
- Citadel of Rock (Purist Headquarters) (Unnamed)
- Megalopolis (conists of Boston, New York City, Philadelphia, Metropolis, Gotham City & Baltimore)
- Arctic Circle
- Fortress of Solitude (Mentioned only)
- United States of America
- Space
- Earth-2020 (First appearance)
Items:
- Fortress of Solitude Key
Vehicles:
- Kalel Kent's Vexor Air-Car (Destroyed)
- Jules Verne Moon Voyager
See Also
Recommended Reading
- Superman Recommended Reading
- Action Comics (Volume 1)
- Action Comics (Volume 2)
- Adventures of Superman (Volume 1)
- Batman/Superman (Volume 1)
- Batman/Superman (Volume 2)
- Batman/Superman: World's Finest (Volume 1)
- DC Comics Presents (Volume 1)
- Superman (Volume 1)
- Superman (Volume 2)
- Superman (Volume 3)
- Superman (Volume 4)
- Superman (Volume 5)
- Superman (Volume 6)
- Superman/Batman (Volume 1)
- Superman Confidential (Volume 1)
- Superman: Son of Kal-El (Volume 1)
- Superman: The Man of Steel (Volume 1)
- Superman: The Man of Tomorrow (Volume 1)
- Superman/Wonder Woman (Volume 1)
- World's Finest (Volume 1)