SCI FI WIRE reports on an interview with John Barrowman at the Television Critics Association press tour in California. Barrowman informed the press that the second season of Torchwood would delve more in to Captain Jack's complicated back story.
"You don't know the exact date when Jack returned yet," Barrowman said. "We do know he was left on Satellite Five [at the end of season one of Doctor Who]. He was brought back to life. He then came back to Earth and arrived back in another time and had to live through it to get to the point where the Doctor came back. In [season] two of Torchwood, there's some of that revealed."
Barrowman also briefly discusses the way other characters will change and guest appearances in the series.
Torchwood's first season will begin airing on BBC America on Sept. 8 at 9 p.m. ET/PT.