Anna Bean’s review published on Letterboxd :
"This is Doctor Who meets A Christmas Carol meets Jaws." - Steven Moffat
Funny, clever, beautiful, heartbreaking, this is by far my favorite Doctor Who Christmas special. Granted, I do have to deal with the Doctor rewriting a person's already established timeline (which he should not be able to do), but the story and the performances are just so lovely that I'm willing to overlook that in this case. Michael Gambon is excellent; Katherine Jenkins is luminous; and Matt Smith is an absolute WONDER at working with children.