Reacher's upcoming Neagley spin-off has finally confirmed one major character's return from the parent series. As many readers of the original Jack Reacher book series would know, Lee Child never wrote any novel focusing primarily on Neagley. In the books' original lore, Neagley was always presented as a secondary character who joined Reacher in some of his crime-solving endeavors. Despite loyally adapting the original Lee Child novels, the Amazon Prime Video detective series is now expanding the original lore by centering an entire spin-off narrative on Frances Neagley.