Millennium, his second attempt at a series, was a darker version of The X-Files, focusing on-end-of-world conspiracies. It was probably a little too dark, as it had trouble finding an audience (though Fox gave it three seasons hoping it would (BTW, the second season was amazing after Glen Morgan and James Wong (Space: Above and Beyond) took over as show runners. Carter took the series back in season three and ran it into the gound)). Harsh Realm, a series set in a virtual reality war game was an instant failure, lasting only nine episodes. That was followed by an X-Files spin-off called The Lone Gunman, which tried to throw some comedy into the old formula. It ran 13 episodes.
Even his attempt to resurrect The X-Files in 2008 with a new movie, The X-Files: I Want To Believe, was a middling success at best, although there is persistant talk of a sequel.
Anyway, a new TV production company, Georgeville, headed by Marc Rosen, is giving Carter a fifth chance with a new series called The After.
The After is a sci-fi/mystery/thriller about the aftermath of some mysterious event, which makes it sound like the recently failed series The Event and Flash Forward. Said Rosen of the new series, “Chris has woven his mythology magic within a very human, grounded story about the moment when we realize all of our worst fears about the world and its future.”
The proposed series does not have a network, nor has it begun production. It will be pitched at next week at MIPCOM, which is kind of like a trade show where production companies try to sell their TV series ideas to networks.