9. The Monsters
Every Doctor faced the Daleks (well assume the Eighth had a hand in the time war, post-TV Movie), most faced the Cybermen, five Doctors went head to head with the Sontarans and there have been three Doctors to face the Siluriuans and the Ice Warriors. All the classics. Oddly enough however, the Fourth Doctor only went up against the Daleks twice and Cybermen once in his seven series tenure. Instead, he faced a whole host of monsters, which went on to be classics in their own right, even with one off appearances. In his time, the Doctor faced killer Robots (Robot, The Robots of Death), Killer human impersonating Androids fronting the Kraal invasion (The Android Invasion) and fan favourites The Zygons, who are finally set to return in this years 50th anniversary episode. Then there was the Rutan. It may have looked like giant floating green balls of snot, but it was a killer, scouting the Earth for an impending invasion and killing everyone who stood in its way (And I mean everyone aside from the Doctor and Leela, everyone in The Horror Of Fang Rock dies) Also, they were the mortal enemies of the Sontarans. When is this death match going to appear on screen? Next is the parasitic Wirryn from The Ark In Space, high-jacking what was essentially a sleeper ship of humans as it returned to Earth, hoping to use the planet as its breeding ground. Worse still, and my favourite monster moment of the Fourth era, was the Krynoid, a Triffid-type creature awoken in the Antarctic (think Doctor Who meets The Thing) that was then transported back to England where it threatened to wipe out all humanity.