Commander Kaagh is a Sontaran of the 10th Sontaran Battle fleet of which he escaped using an escape pod and he has a score to settle.He will oppose Sarah jane and her friends in The Last Sontaran and possibily Enemy of the Bane. He is said to be a different kind Sontaran to what has been seen before.
Kaagh seems to have battle scars. He is missing a chunk of his right ear, a scar running from his forehead to the right of his mouth,he is missing the gloves of his armour so his hands are revealed, his armour is scratched and scuffed.
Commander Kaagh seems to have a new smaller version of the guns used in the Sontaran and UNIT war. He also has a new communicator.