10 Doctor Who Episodes You Didn’t Know Were Connected
7. A Good Man Goes To War & Thin Ice
One of the more intriguing relationships in modern Who is the one between the Doctor and his wife/friend's kid/would-be assassin River Song.
The pair are star-crossed in the most literal sense, constantly bumping into each other at different points. They go on many adventures together, one of which is mentioned right at the start of the epic mid-series finale A Good Man Goes to War.
River tells Rory (who's dressed as a Roman, because reasons) that she's just come back from a birthday trip with her Time Lord squeeze.
She says the Doctor took her ice skating at the last great London frost fair, which sounds like a lovely day out. Clearly the Doctor thought so, because he took Bill Potts to the exact same spot in Series 10's Thin Ice. He even admits that he's been there before.
It's a nice little connection between these two different eras of the show, although taking two dates to the exact same place? Rookie mistake, Doctor.