Artie Maitland[1] was the son of George Maitland and brother of Angie Maitland.
After his mother passed away, Clara Oswald became his nanny. In 2013, he borrowed the book Summer Falls from Clara. (TV: The Bells of Saint John)
He and his sister discovered images through history of Clara and decided to question her. (TV: The Crimson Horror)
He was taken with his sister to Hedgewick's World of Wonders by the Eleventh Doctor and Clara. There, he was asked by the Doctor to remain in the room full of statues which Mr Webley had collected throughout his life while he investigated the Cybermites. He became afraid and when turning the light on, he was attacked by a Cyberman; his and Angie's child minds were used to build the Cyber-Planner. Put into a walking coma and not fully upgraded, he was finally released when Mr Clever freed him and his sister once the Doctor sacrificed a chess piece in their game for control of the Doctor's mind. Clever threatened to have Webley kill them, but Emperor Ludens Nimrod Kendrick Cord Longstaff XLI used a hand pulse to deactivate him. The Doctor picked up the pulse to distribute Mr Clever among the army of Cybermen.
The Emperor set off the explosive to implode the planet with the Cybermen still on it, which drew the attention of his ship. The ship transmatted the Doctor, the humans on Hedgewick's World and the TARDIS on board. The Doctor then returned Clara, Artie and Angie home. (TV: Nightmare in Silver)
Back in London, Clara prepared to make another of her mum's soufflés for Angie and Artie, to Angie's displeasure. Angie told Clara she had a letter sent to her. The letter held a soporific which caused Clara to fall asleep. Later, when George left the house, the Doctor agreed to take care of Angie and Artie, demanding that they couldn't go to the cinema until Clara woke back up. They tricked the Doctor into playing blind man's buff, which Clara realised after waking up was a ruse to get to the cinema. (TV: The Name of the Doctor)