 Jack questions Owen about Gwen and Rhys , and he states that Rhys ' mother Brenda ( Nerys Hughes ) is with them . <unk> mentions that she saw Brenda with Gwen 's mother Mary in the garden . <unk> and Jack rush to the couple 's room , where Jack identifies Brenda as an alien and calls her an " ugly <unk> " . After Brenda protests her innocence and Rhys <unk> Jack , Gwen states that Rhys ' mother is not the <unk> as Brenda wears a distinctive perfume . Torchwood reach the garden to find the Nostrovite , in Brenda 's image , with Mary . The alien holds Mary hostage , demanding that Gwen give her her child . Gwen walks towards them and as the Nostrovite releases Mary , Gwen reveals a hidden gun in her wedding bouquet and fires at the creature . Owen suggests using a piece of alien equipment called the <unk> <unk> to destroy the alien fetus . He sends Gwen to her room and teaches Rhys how to use the <unk> ; Owen cannot use it himself due to injuries sustained in his undead state . Gwen is approached by Jack and reveals to him that she would have married Rhys a long time ago if she had not met him . She leans in as he appears to be ready to kiss her but he reveals himself to be the Nostrovite . Owen enters , shooting the creature whilst Gwen exits with Rhys . The Nostrovite , still in Jack 's form , attempts to attack Owen only to be repelled by the fact he is dead . 
