Doctor Who 73 Yards for 98% of the episode: Cool, intruguing, engaging, interesting, compelling.

Doctor Who 73 Yards for the last 2% of the episode: HUH????? What? How? Why? That's it? But...but...

Now I'll have to wade the murky waters of DW social media to hear the "real explanations" people have invented for the all the things that ending totally did not explain or make sense for....