Owen Harper dies for the second time in the "Torchwood" episode titled "Exit Wounds," which is the final episode of Season 2. In this episode, he is killed by a member of the Weevils while trying to save his teammates. His death occurs after he has been resurrected once, and it ultimately leads to a poignant conclusion regarding his character's arc.
Yes he died in the same episode as Toshiko preventing a nuclear meltdown in the last episode of the last series.
Owen Wyn Owen died in 2012.
Will Owen died in 1981.
Owen Owen - school inspector - died in 1920.
Owen Lattimore died in 1989.
Owen Cox died in 1932.
Owen Wade died in 1902.
Daniel Owen died in 1895.
Owen Rowe died in 1661.
Owen Merton died in 1931.
Norman Owen died in 1977.
Owen Hopton died in 1595.