The actor who plays Keiko has shared that they shot a scene — at the point where Keiko sees the younger Lee in the rift — in which Keiko made a conscious decision to stay and help Cate instead of going back into the rift with Lee.

The scene was deleted in the final cut for streaming television.

Setting aside the problem that there would have been two different Keiko’s present in Axis Mundi at the same time if she had returned, this strongly suggests that the creators are playing with the idea that multiple instances of a person can exist.

Let’s see what they do with this (assuming a season three announcement is imminent).