DaCosta

Dacosta was an International liaison at the UNIT New York Base in 2009. She was asked by Martha Jones to see to the turning on of the lights in the base after Planet Earth was moved. She was last seen crouching behind a desk as the Daleks invaded the command room; she was exterminated after Suzanne. (DW: The Stolen Earth)

Behind the scenes

 * The actor's name was not listed on the BBC's website nor the list of credits when The Stolen Earth was broadcast.