Steven Carter
From Tardis Wiki, the free Doctor Who reference
Steven Carter was the son of Joe and Alice Carter and the grandson of Jack Harkness and Lucia Moretti.
Profile
Steven's mother described Jack as his uncle as she wanted not to explain to him Jack's immortality and agelessness. The two appeared close, although their contact was infrequent. When Jack needed a child to defeat the 456, Steven was used to reverse the signal and kill the 456 on Earth. His mother cradled his dead body tearfully as Jack watched. (TW: Children of Earth: Day Five)
Behind the Scenes
Steven's death was the first death of a child seen onscreen in the Doctor Who Universe.
