Fans of Torchwood will be happy to know that scripts are currently in the works for a third season and that filming is expected to begin sometime in August. Even better news: John Barrowman is returning.
However, some less good news is that as of now this third season will only consist of five episodes, which will all be airing in the span of one week. Thus, it's more of a mini-series than a new season.
Could there be more episodes after this? Possible, but not yet decided.
Source: TV Guide