The following contains spoilers from the Season 15 finale of Doctor Who, “The Reality War,” now streaming on Disney+. When all was said and done, the return of the Rani was far from the biggest deal in the Doctor Who season finale.

A familiar face to “Doctor Who” fans is rejoining the long-running British sci-fi series as Ncuti Gatwa exits the lead role after two seasons.

As The Rani's grand plan to bring back Omega, one of the first Time Lords, unfolds, many Doctor Who fans are worried about The Doctor and Belinda in a season finale where it seems the odds are stacked against them. Here's what they're saying ahead of this dramatic episode, and why they suspect Gatwa is leaving as The Doctor.