re: possible disappointment on the reveal of "whodunnit"....
imho we are all a bit spoiled because we have watched/read this type of story so many times before. we have watched a combination of simple stories done well and highly complex stories with a clever denouement,to the extent it's like playing cleudo. we think, oh that character fits into that "type" (e.g. dedicated cop who has messed up their private life because of work) and that character into that different "type" (e.g. creepy looking person) and our minds automatically categorise characters and try and second-guess the plot right from the start (hence wonderful and highly enjoyable threads like this
)
in a way i wish i had never seen a programme like this before because i think it would have been a different experience without all that mental baggage.
however, nomatter who the killer turns out to be, i feel confident that the writers will have plotted and written the final episode in keeping with what and whom we have already seen. they got the second and third series, after all, so viewers in denmark can't have thought the outcome was so disappointing!
the way i think the plot is going to pan out is not very clever or tricksy, but it is in keeping with the story the writers have told. what's more that story has been told in such a high quality, rounded, compelling, frustrating, heartfelt and visually rich way that i have loved going on lund's journey with her. and to me, that could never be a disappointment.