Children of Earth : Day Three ( TV story ) Children of Earth : Day Three was the third episode of the third series of " Torchwood " . It notably introduced the 456 after the buildup in previous episodes . Torchwood Three also established a new temporary base of operations and pilfered a new car to replace their stolen SUV . Synopsis . The eyes of the world turn to Britain . The 456 announce : " We are here , " as the new Torchwood adventure continues . A pillar of fire descends upon London and Torchwood must battle to protect their own families as the fight gets personal . Will Clem ' s memories destroy everything ? Plot . The team , including Rhys , have set up a base in an old factory once used by Torchwood One for storage . As a former police officer , Gwen knows all the tricks of the criminal trade , including stealing mobile phone s , debit cards and laptops from people off the street . Jack makes off with a car . Soon the base is stocked with creature comforts ; coffee , electricity , access to the Torchwood server , toiletries , and new clothes for the group , including replacement World War II era apparel for Jack , thanks to an Army Surplus special . When he researches the other people targeted for assassination , Jack is shocked . He seems to recognise them and he runs off . In Cardiff , Jack ' s daughter Alice is still trying to contact him ; she goes outside and borrows a girl ' s mobile to phone the Cardiff police , but the government ' s scanners pick up Jack ' s name and try to find the connection between them . Agent Johnson gets word of this . Her team take Alice and her son away to " help " them . Suddenly , Steven points southeastwards to London as all the children on Earth are pointing towards London . A pillar of fire descends from the sky and enters Thames House . Fiery energy fills the gas containment system . John Frobisher and Mr Dekker meet with the alien s , who instruct the humans to call them " 456 " . During the discussion , Frobisher extracts a promise from the 456 that it will not mention its previous visit to Earth in 1965 . Gwen surprises Lois Habiba at a cafe and asks her to wear some special contact lenses to allow Torchwood to see what is going on . Lois protests but takes the contacts . Gwen phones PC Andy to bail Clem McDonald out from police custody and brings him to the base . Jack sneaks into Frobisher ' s house and steals his wife ' s mobile . He phones Frobisher , having made the connection between the children and the events of 1965 . He threatens Frobisher with " blow [ ing ] this thing sky high " . Frobisher tells Jack they have taken his daughter and grandson into custody and will kill them if he does . Jack threatens to do the same , but Frobisher knows he would never do such a thing . That night , Frobisher , Bridget Spears and Lois Habiba enter the gas chamber room , which is being filmed for the Prime Minister and being transmitted to a conference room where UNIT , an American general and the Prime Minister are watching . Frobisher demands the 456 cease using human children to communicate ; in return the 456 demand a gift : 10 % of the children on Earth . Back at the warehouse base , Clem tells Gwen he can smell the man who brought the children to the aliens . When Jack walks in , Clem recognises him as the man who gave the twelve children up to the aliens in 1965 . When Gwen protests that Jack is a " good guy " who fights aliens , Jack informs them that in this instance , he had done what was asked . He gave the 456 the children . . . " as a gift . " Story notes . Filming locations . " to be added "