https://www.cbr.com/best-doctor-who-episodes-peter-capaldi-ranked/

Peter Capaldi was Doctor Who's Twelfth Doctor, traveling with Clara Oswald and Bill Potts to face Daleks, Cybermen and two versions of the Master.

What are the Daleks in Doctor Who and Why are They So Scary? (https://www.cbr.com/doctor-who-daleks-explained/)

Doctor Who returns which means his arch-enemies aren't far behind, and the Daleks are arguably the most terrifying of them all.