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Executive producer Julie Gardner told TV Guide: "We've decided to do a five-part mini-series, one big story that will run during one week. I wanted to make a really big noise about the show."

Gardner, who confirmed that John Barrowman will be back as Captain Jack, remained coy about any additions to the cast following the death of two regular characters in the second season finale. However, she said that fans of the show "will be pleased with the casting".