De Maggio

De Maggio was an officer in Bywater's security detail in the Vault, in Henry van Statten's underground base. She was charged with getting Rose Tyler and Adam Mitchell to safety after van Statten's captive Dalek, nicknamed "Metaltron", broke free and began slaughtering her comrades, including Bywater. The Dalek eventually caught up with the fleeing trio in a stairwell. At first they thought the Dalek couldn't climb after them. De Maggio tried to negotiate with it, but to no avail, and it elevated up the stairs towards them. De Maggio sent the youngsters on and, staying behind, opened fire on the Dalek in a brave but futile attempt to stop it, only to be exterminated, one of 200 personnel who died fighting the Dalek. Horrified at De Maggio's death, as well as the others, van Statten's assistant Diana Goddard had him mind-wiped and the Vault sealed with concrete. (TV: Dalek)