(Some spoilers ahead for season 2 of “Jack Ryan” on Amazon Prime Video)

For those who are familiar with that, ah, “lore” of the Jack Ryan character from Tom Clancy’s novels, the second season of the “Jack Ryan” show on Amazon can be a little bit disconcerting for how it seems to erase from history a certain major character: Cathy Mueller, who was played by Abbie Cornish in season 1.