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 Scott died in 1928.
Owen Johnson died in 1952.
Owen Swindlehurst died in 1995.
Owen Churchill died in 1985.
Edwyn Owen died in 2007.
Owen Burns died in 1937.
Huw Owen died in 1996.
Owen Rutter died in 1944.