Throughout their travels in time and space, The Doctor and his companions have battled all sorts of monsters and evil villains. Many of their enemies were gone forever but some of them have returned in some way or another in the show.
A month ago (17th of September 2024) the Doctor Who Magazine announced that the Black Sun Rising was available early - direct from Panini.
If you enjoy the movies with pirates and that contain fights with swords you may enjoy this episode too. If you'd like to see the bottom of the sea as you are inside the TARDIS you may watch it too. The episode is fun, it has special effects (some of them are excellent), but that's about it - it does not stand with anything else.
The next episode of new Doctor Who will be aired on 17 April 2022, 2 weeks from now, and it's one of Jodie Whittaker's latest episodes as the Doctor (the very last one will be aired in the autumn, probably, when the 14th Doctor will make his/her appearance).
You should be prepared for the next special episode, so you can watch a fan-made video about the history of the Sea Devils - he talks about one of his favourite monsters continuing on from his last video where he talked about the Silurians.