Stranger (The Inheritance)

A stranger called the Doctor's TARDIS and asked for help. Valarie Lockwood wondered if it was Clara Oswald, but the Eleventh Doctor told her that it was not. The TARDIS was then hijacked. (AUDIO: The Inheritance)

The stranger called the TARDIS prior to it being hijacked once again. She asked for help and used the phrase "only ones", which the Doctor inferred meant that she was a Time Lord and was the time traveller who supplied Arabella Hendricks with the Darinthian Blight. (AUDIO: The End)