Only child
From Tardis Wiki, the free Doctor Who reference
Dean was an only child. Yvonne Hartman considered not hiring him at Torchwood One because of this. (AUDIO: Through the Ruins)
Matt Stevens was an only child. (TV: Day One)
Lizzie Lewis was the only child of Mabel Ann Lewis. (TV: Ghost Machine)
Mrs Wormwood claimed Luke Smith as her only child. (TV: Enemy of the Bane)
