DW Christmas Special 2015: The Husbands of River Song

A Guide to Classic Who references in new Who.

Doctor Who Christmas Special #11.  The Doctor meets up with an old friend.  It's River, obviously, her name's in the title so it's not like a spoiler or anything.

DW Christmas Special 2007: Voyage of the Damned

A Guide to Classic Who references (and other references) in new Who and spin-off episodes.

Doctor Who Christmas Special #3 (Story 32).  The Doctor spends Christmas on the Titanic.  Not that one, another one.

DW Children in Need Special - "Time Crash"

A Guide to Classic Who references in new Who and extras.

A special short for "Children in Need," a charity run by the BBC (Donate here):  Occurs during the final moments of "Last of the Timelords" after Martha left but before the TARDIS collides with the Titanic.  One of the many extras associated with the new series of Doctor Who.

Warning: May contain Spoilers for

The Children in Need Special: Time Crash

DW 09-12: Hell Bent (Part 3 of 3)

A Guide to Classic Who references in new Who.

Doctor Who series 9 episode 12 - The Doctor returns to Gallifrey.