Handles

 was the nickname given to a Cyberman head repaired by the Eleventh Doctor after he got it in the Maldovarium Market. It went on many adventures with him as he searched the mysterious Trenzalore. When the Doctor ended up staying there in Christmas for many years, Handles was his only companion for three hundred years, before it shut down, at the same time finally fulfilling an order the Doctor had given it three hundred years before – an order to tell the Doctor to patch the TARDIS phone back to the console. Handles' death reduced the Doctor to tears.