- This version of the character is exclusive to the continuity of the television series Young Justice and its tie-in comic book series. It is an adaptation of Jim Harper/Guardian. The original character was created by Joe Simon and Jack Kirby and first appeared in Star-Spangled Comics #7.
- Guardian was voiced by Crispin Freeman.
- 13 Appearances of James Harper (Earth-16)
- 1 Images featuring James Harper (Earth-16)
- Quotations by or about James Harper (Earth-16)
- Character Gallery: James Harper (Earth-16)
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