I'm not getting the sense that it'll be a Doctor lite episode. For one, that would be a pretty large mistake to make at this point of the story, and there are so few episodes anyway.Sooo... episode 5 will either be Doctor Light (with everyone else trying to get out of their respective predicaments and/ or trying to rescue her, hopefully) OR the Doctor in a dreamscape, receiving a Divsion Very Expository Powerpoint Presentation, right? The latter would mean we'd start getting some answers, at least... And I hope we'll see that black & white dreamscape house again. Maybe the Division need the Doctor's help.
I'm guessing they haven't shown many promo images of the Doctor in this story because it would give away whether she's still in angel form or not.
My guess is the Angel's/Division needs her help. So, while captured by them, she won't be in any immediate danger from them. Additionally, back in Jo's time, the Division didn't destroy the Doctor but erased her memories. That may well be their plan here. Capture her, force her to help them, and then release her with her memories erased.