Know Your Enemy is a daily feature that has now returned to Tardis Base looking at monsters from either Doctor Who, Torchwood or SJA

Name: Sontaran
Species: Sontaran
Episodes: The Time Warrior (1973), The Sontaran Experiment (1975), The Invasion of Time (1978),The Two Doctors (1985), The Sontaran Stratagem (2008), The Poison Sky (2008), The Last Sontaran (2008), Enemy of the Bane (2008) & The Pandorica Opens (2010).

Information: The Sontarans are ruthless killers, they come in clones and there favourite expression is "Sontar-Ha". When the Sontarans returned to our screens after 23 years, the Tenth Doctor had the pleasure of stopping them from polluting the world using car systems called 'Atmos'. The Second time old companion Sarah Jane Smith met one of them that survived the destruction of the tenth Sontaran battle fleet. Commander Kaagh hypnotised a local scientist that helped him create a programme that would wipe out the human race. After Sarah Jane stopped him, he was told never to come back but when Sarah Jane ran into Mrs.Wormwood an old enemy of hers, she discovered that Kaagh had came back. The Sontarans were last seen amongst the crowd that locked the Doctor inside the Pandorica.

Appearance: Short, stocky aliens have dome shaped heads and very strong features. They are extremely feisty and bred for battle. Kaagh has a number of scars from past battles which he wears with pride as a badge of honour.

Weakness: A probic vent at the back of their neck, if hit it can kill them within seconds.