The Wedding of River Song - S6-E14
Continuity mistake: When River sits down by the table as she and Amy are talking and drinking wine, in shots of River, Amy's wineglass is sitting on the corner of the table. In shots of Amy, the glass is first absent, then Amy reaches over, grabs it and takes a sip before resting it on the table with her hand holding the stem, whereas her hand is in her lap in shots of River. (00:40:40)
The Wedding of River Song - S6-E14
Continuity mistake: When the Doctor realises he's picked up a model of the TARDIS in Amy's office, it rotates in his hand between shots, as indicated by the positioning of the sign on the front door. (00:20:55)
The Wedding of River Song - S6-E14
Continuity mistake: During the live chess game, the position of Gantok's hand changes between wide shots and close-ups of the electrified queen piece. (00:06:33)
The Wedding of River Song - S6-E14
Continuity mistake: When the Doctor compares Amy's inaccurate drawing of Rory to the real deal and laughs, in a shot facing Rory the Doctor is shown lowering the picture, than in the next shot facing the Doctor he still has the picture raised. In addition, his grip on the paper changes from holding the bottom of the page to the side, and it also switches hands. (00:23:33)
The Wedding of River Song - S6-E14
Continuity mistake: When the Doctor and River are wrapping his bowtie around their hands in a handfasting, the length of the cloth changes between the close-up and the wide shot. (00:37:40)
Chosen answer: No, no information is avalible for the identity of the entity.
Repo_Man