Board Thread:The Panopticon/@comment-26469787-20150726050336/@comment-5918438-20160106012655

Hmm. I suppose if the events of Mercy take place during TPOT, it would make sense that given the narrative, they'd release the adventure-within-the-adventure first, so that the end of Power of Three could follow on immediately to the Ponds' exist in the mid-series finale.

If it does truly take place during, then that's a different case to reordering the stories. The Power of Three goes over a long period of time, between sometime after Dinosaurs, and Angels Take Manhattan.

Indeed, The Wedding of River Song takes place before, during and after the opener of the same series, for the various people involved.