Some are from the latest issue of DWM and some were submitted on GallifreyBase ....
Adrian Scarborough is playing a character called Kahler Jex in a Western episode along with Ben Browder and Rob Cavezos. Presumably this is for Toby Whithouse's episode, right? Either way, wonderful casting. The first block is 7x02 by Chibnall and 7x03 by Whithouse is directed by Saul Metzstein while the second block directed by Nick Hurran is two episodes written by Moffat. Presumably the opener and maybe Amy/Rory's exits.
http://www.spotlight.com/interactive/cv/1811-4502-6457