Harriet Jones.

About Harriet Jones

Harriet Jones is a fictional character played by Penelope Wilton in the long-running British science fiction television series Doctor Who. Having worked previously with lead writer and executive producer Russell T Davies, Wilton was keen to involve herself with his 2005 revival of Doctor Who after he sought to cast her. Jones is introduced in the two-part story "Aliens of London" and "World War Three" as a Member of Parliament who aids the Ninth Doctor against an alien invasion of London. The episode establishes a running joke associated with the character which would see her frequently introduce herself by holding up her ID and stating her name and position; in subsequent episodes this was usually met with the response "Yes, I/we know who you are," even occurring with the Daleks and the Sycorax.