Doctor Who: The Doctor's Regeneration Episodes Ranked Worst To Best

The first part of the fourth series finale is a breathless, thrill-a-minute blockbuster, accompanied by a suitably dramatic score from Murray Gold. And to think, Russell T Davies had to cut some spectacular stuff from his original draft.

There's an Avengers team up feel to the whole spectacle, even down to the episode description as "Earth's greatest heroes assemble to fight the New Dalek Empire...". It's a good job Harriet Jones (no idea who she is) channels her inner Nick Fury and kicks into gear the Doctor's secret army, especially after Captain Jack has seemingly given up all hope with an Independence Day-esque cheesy line to Gwen and Ianto: "I'm sorry. We're dead." Then there's brave Wilf, armed with a cricket bat and paintball gun. God bless that man.

Despite humanity's impending doom, you can always rely on us Brits to keep calm and carry on by watching a Paul O'Grady teatime chat show. There's a nice bridge between Classic and NuWho through Sarah Jane's terrified and then resolute reactions to the Daleks and Davros.

Goodbye vanity man. Hello... Now then. Where were we?: "I didn't need to change. I didn't want to. Why would I? Look at me." Agreed.

Throughout both episodes, the Daleks' Nazisms are eerily invoked when they screech exterminieren! in German, and laid brutally bare when seeing them gruesomely blast a young family to death, before giving Thanos some Decimation stylistic tips by doing a Reality Bomb test on poor old Gita from EastEnders among others.

Fortunately, the ever-brilliant Donna saves the universe and plays Dalek dodgems in quicker time than she can type a hundred words per minute. What happens to her afterwards is simply heartbreaking.