 On the night before her wedding , Gwen Cooper ( Eve Myles ) is bitten on the arm by a male shape shifting alien . Her boss , Jack <unk> ( John Barrowman ) kills the alien , and Gwen attends her hen night though is troubled by her wound . She wakes up the next morning heavily pregnant . Jack arrives along with Torchwood 's <unk> Owen Harper ( Burn <unk> ) to examine Gwen and tries to persuade her to cancel her wedding . Gwen 's <unk> Rhys ( Kai Owen ) also tries to postpone the wedding in Gwen 's interest but Gwen insists that the wedding go ahead as she desires nothing more than to marry him . The sudden pregnancy is explained to Gwen and Rhys ' families as their own child . Gwen 's mother ( Sharon Morgan ) and father ( William Thomas ) are excited at the prospect of a <unk> , but Rhys ' parents suspect Gwen of being pregnant by another man . Torchwood agent Toshiko Sato ( Naoko Mori ) is sent to the wedding venue to keep an eye on Gwen and to deliver a new wedding dress to accommodate her alien pregnancy . 
