The Daleks have been The Doctors longest-running enemy. They were people once, but a thousand-year-long war against the Thals forced them to remake their race into cyborg tanks intent on racial purity and being the superior race of the galaxy. Taking that to it's logical conclusion, the Daleks develop over time technological mastery way beyond anyone's imagination, but dedicated to the cause of wiping out all other inferior life forms.
When the Doctor first met the Daleks they were already dangerous
Dalek Invasion of Earth - The Daleks take over LondonThe Chase - Old-school Daleks had specialized instruments they could useDalek Master Plan - Such as flame throwersPower of the DaleksEvil of the Daleks - The Doctor faces, and destroys, the Emporer Dalek on SkaroDay of the Daleks - They've also come in different colorsDay of the DaleksPlanet of the Daleks - They tried being invisible, but spray paint revealed The DaleksDeath to the Daleks - on the planet ExxilonGenesis of the Daleks - We meet the Dalek creator, Davros, and the Doctor gets an opportunity to commit genocide and prevent the Dalek menace, but refusesDestiny of the Daleks - They return to Skaro, and a fight with The Doctor and his companion, Romana #2The Five Doctors - The first look inside a Dalek casing at the creature living in the tankResurrection of the Daleks - Another meeting with Davros as he tries to improve his DaleksRevelation of the DaleksRemembrance of the Daleks - we not only meet the Special Weapons Dalek, and see two strains of Daleks fighting each other, but see the first flying Dalek who's no longer stumped by a stairwellDalek - The first New Series, first post-Time-War, sighting of a Dalek. This one somehow escaped being destroyed in the Time War.
About the Author(s)
David Herron:
David Herron is a writer and software engineer focusing on the wise use of technology. He is especially interested in clean energy technologies like solar power, wind power, and electric cars. David worked for nearly 30 years in Silicon Valley on software ranging from electronic mail systems, to video streaming, to the Java programming language, and has published several books on Node.js programming and electric vehicles.