 The government previously sacrificed 12 children to the aliens in the 1960s in an effort to appease them, a project in which they had Jack's assistance.In the present day however, Jack refuses to give in to the 456's demands, constantly seeking an alternative solution as he claims "An injury to one is an injury to all.After the death of Ianto and the realisation that he is in no position to bargain with the 456, Jack agrees to sacrifice his own grandson Steven in order to kill the 456, also destroying his relationship with his daughter in the process.