Mercy (Uranus)

From Tardis Wiki, the free Doctor Who reference

Mercy was the most famous film star in the Galactic Federation in the 41st century.

One of her movies was Mercy is... Dalek Killer. She died in an accident in 4009. Merculite impersonated her as part of her plan to prevent the asteroid Maleficent from colliding with Uranus. (PROSE: Uranus)