When Clark Kent was in his early twenties, Jonathan and Martha went on a vacation in the Caribbean where they discovered a buried treasure chest. Opening the chest released a virulent alien micro-organism that infected both of them. Young Clark tried to save them, but failed. Both Jonathan and Martha passed away at the same time. 
Several years later, aliens fulfilled a wish to Jonathan Kent, and allowed him one more day with this adult son, Superman although nobody on Earth would remember it.
- This version of Jonathan Kent (Earth-One), including all history and corresponding appearances, was erased from existence following the collapse of the Multiverse in the 1985-86 Crisis on Infinite Earths limited series and is now considered apocryphal.
- He was first specifically addressed as Jonathan Kent in Adventure Comics #149.
- Jonathan Kent's final appearance is generally considered Superman #161 (in flashback), though his death was also shown earlier in Action Comics #158. The cause of his death was illustrated in flashback in Superman #363.
- Pa Kent's genealogy was revealed in Superboy #146:
- 213 Appearances of Jonathan Kent (Earth-One)
- 16 Images featuring Jonathan Kent (Earth-One)
- 1 Quotations by or about Jonathan Kent (Earth-One)
- Character Gallery: Jonathan Kent (Earth-One)
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Superman Family member