We watch "Revolution of the Daleks" (Series 12, Episode 11) where Captain Jack Harkness busts the Doctor out of the Judoon Prizoon whilst the Whoby crew celebrate New Years Day by complaining that the Doctor hasn’t been around to visit. So anyways... when the Doctor returns to Earth after (for her) decades atoning for a crime she didn’t commit, she encounters various Daleks attempting to (again? yawn...) conquer Earth! Thankfully Yaz continues to travel with the Doctor unwhilst Graham and Ryan go off on a bicycle built for Graham. Cuz Ryan has bicyclaphobia or something. It’s a call back people!