Doctor Who Season 14

7 “The Legend of Ruby Sunday”
The Doctor and Ruby visit UNIT headquarters to investigate the woman they have seen throughout time.
The Doctor also wants to identify Ruby’s birth mother. Using UNIT’s Time Window, the Doctor and Ruby enter a 3D projection of Christmas Eve 2004, but Ruby’s mother is inexplicably obscured.
This is just a muddle of plot strands that gets thrown together to confuse the watcher. It’s not until the third act that things coalesce into a traditional “big bad monster” story.