Quite an eventful tour by any standards!
The show list is available here: https://en.wikipedia.org/wiki/Imaginaerum_World_Tour
In a few days will be the anniversary of the so-called "Denver Debacle", which still divides fans as to whether it was a good call or not to forge ahead with a makeshift show while Anette was sick in hospital, helped by borrowed singers from the cover band! History was made, fatal words were written, some of which can be found here in the Media forum:
As for the Denver show, the whole story was detailed in the well-known documentary "Please Learn the Setlist in 48 hours"...
https://www.youtube.com/watch?v=vhExkmWKMEU
A more complete recording of the unique show can be found here:
https://www.youtube.com/watch?v=zH33rNy33iU
In retrospect, we can say that everything turned out all right for Nightwish, but things were looking really bad back then in late September 2012, while fans were probably oblivious to most of it. It would take nothing short of a miracle to turn things around... π