(John Simm), Jack opts to return to his team in Cardiff. Before departing, Jack speculates about his immortality and reminisces about his youth on the Boeshane Peninsula, revealing that his nickname had been the "Face of Boe", suggesting that he may one day become the non-humanoid recurring character of the same name, voiced by Struan Rodger. In Torchwoods second series (2008), Jack returns with a lighter attitude, and finds his team have continued working in his absence. They are also more insistent to learn of his past, especially after meeting his former partner, the unscrupulous Captain John Hart (James Marsters). The episode "Adam" explores Jack's childhood in the Boeshane Peninsula, revealing through flashback sequences how his father Franklin (Demetri Goritsas) died and young Jack (Jack Montgomery) lost his younger brother Gray (Ethan Brooke) during an alien invasion. Flashbacks in the series' penultimate episode "Fragments" depict Jack's capture by Torchwood in the late 19th century. Initially their prisoner, Jack is coerced into becoming a freelance agent for the organization, and eventually becomes leader of Torchwood Three at midnight on 1 January 2000. The series finale features the return of Captain John and Jack's brother Gray (Lachlan Nieboer), who, after a lifetime of torture by aliens, wants revenge on Jack. While Jack manages to repair his friendship with Captain John to some degree, he is forced to place his brother in cryogenic stasis after Gray kills his teammates Toshiko Sato (Naoko Mori) and Owen Harper (Burn Gorman). Jack subsequently appears alongside the casts of Torchwood and The Sarah Jane Adventures in the two-part crossover finale of the 2008 Doctor Who series, "The Stolen Earth" and "Journey's End". Jack is summoned along with other former companions of the Doctor to assist him in defeating the mad scientist Davros (Julian Bleach) and his creation, the Daleks. Jack parts company from the Doctor once again, having helped save the universe from destruction. Torchwoods third series (2009) is a five-part serial entitled Children of Earth. Aliens known as the 4-5-6 announce they are coming to Earth. Civil servant John Frobisher (Peter Capaldi) orders the destruction of Torchwood to cover a conspiracy; in 1965, the British government had authorized Jack to sacrifice twelve children to the 4-5-6, which is shown in flashbacks. Jack is blown apart in an explosion, but painfully reconstitutes from an incomplete pile of body parts; Gwen and Ianto escape and later rescue Jack