The follow-up to Under Control pits the Fourteenth Doctor against the Sycorax, or more accurately the Sycorax Queen. Poetically it makes sense, the Sycorax were David Tennant's first monsters and here in his return year as the new Doctor you want to have a rematch, though it does further demonstrate how the 60th anniversary seemed to prioritise celebrating the Russell era rather than 60 years of Doctor Who. There's a clever way it handles the Sycorax blood control and how the Fourteenth Doctor tricks them but aside from that it's just as unremarkable as it's predecessor.