On his early days as Zatanna's manager, Jeff helped her work on her stunt performances and he also joined her in some of her mystical adventures where he was often victim of evil magic spells, but he was always saved by Zatanna.
After a brief hiatus, Zatanna returned to the show business and Jeff resumed his role as her manager, falling deeper in love with her; but unable to express his true feelings, Jeff simply supported Zatanna as a very close friend.
- Although this character was originally introduced during DC's Earth-One era of publication, their existence following the events of the 1985–86 limited series Crisis on Infinite Earths remains intact. However, some elements of the character's Pre-Crisis history may have been altered or removed for Post-Crisis New Earth continuity, and should be considered apocryphal.
- 14 Appearances of Jeffrey Sloane (New Earth)
- 3 Images featuring Jeffrey Sloane (New Earth)
- 1 Quotations by or about Jeffrey Sloane (New Earth)
- Character Gallery: Jeffrey Sloane (New Earth)