There will always be heated debates about not only the best Doctor, but the finest criminal and of course which are the best Dr Who Episodes. Over the course of its life the Dr Who stories have developed in such a method that they have become a fundamental part of growing up.

Although not everybody knows every Dr Who episode, there're a lot of people who have seen pretty much all of them, in a jumbled order. Somehow, the order doesn't seem to matter.

As the Doctors life doesn't happen in order, somehow it doesn't seem to matter to the viewer which order they visit it in. There are obviously some episodes which are more favored than others; because of this they are shown more often. But are they the finest Dr Who Episodes?

To establish the greatest Dr Who episodes you have to first consider the different doctors. The early Doctors; William Hartnell, Patrick Troughton, Jon Pertwee & Tom Baker all created and portrayed their characters with great style and managed to save the universe in methods beyond our imagination. Then it did goes a little pear shaped with the middle variety of actors. The arrival of Christopher Eccleston reignited a love of Dr Who which was prolonged by David Tennant and it seems like Matt Smith will follow with identical success.

Within these Physicians, the greatest Dr Who episodes have need to include a classic villain. Although we all love the idea of the Slitheen wearing a zip up human form, they cannot compete with the classic villains who've tormented the Doctor in his a lot of forms such as the Daleks and the Master.

When Terry Nation created the Daleks he could not have had any idea of how they'd affect so many people and the many different methods they would take.

The combat between the Doctor and the Daleks is usually about one Time Lord fighting many Daleks at once, yet still he conquers. Alternatively the Doctors other biggest rival, the Master, is about one to one individual battle; one which he can never quite win.

So possibly the greatest episodes have got to be a combination of the Master and the Daleks? This is too obvious. Surely the final challenge for the doctor would be to take the hardest single villain, but to multiply him across the planet so that every human is now the Doctors enemy. This is exactly what happens in the story the End of Time, making these two episodes the most difficult and spectacular Dr Who Episodes ever.