Morning all. Bleary eyed this morning despite two cups of tea. Late night for me and then couldn't sleep as all this very fresh in my mind.
I kept thinking about this (following on from atswim's summary):
a) Nanna enters flat at 11 ish (didn't she leave the party at 10.30 and then drop off her books at Rama's?) Btw, still don't know why she couldn't have done that earlier in the day. 
b) Now, can't remember. Isn't Troels meant to leave at 11pm after having downed a bottle of something strong? Wouldn't it be odd if Nanna came in and he immediately raped her (even after all the drinking) unless he had had affair with her previously which turned sour, a bit like with Shagabout.
So, I'm thinking that Troels stumbles off in taxi (even possibly the taxi that Nanna arrives in) and someone (Vagn?) who has been following her forces his way into flat and rapes her.
Then she gets drugged with the ether, bunged in the back of the Birk Larsen van and driven to either a) Birk Larsen warehouse where Rama was beaten up b) Theis's new house c) the garage/storeroom bit under Theis/Pernille's flat.
But, not sure how this links with Bremmer/setting Troels up to take blame.
And one other thing that I can't get my head around. What is the significance of Troel's saying he got the lift to the flat that night, and Lund confirming that it was out of action? Just an indication that he's a very capable liar or something else???