Today, BBC America announced they are coproducing Atlantis, the new sci-fi series from Howard Overman (Misfits) and Julian Murphy and Johnny Capps (Merlin). Ripper Street is a BBC America coproduction. Sherlock is a WGBH/Masterpiece coproduction. Even An Adventure in Time and Space is a coproduction with BBC America. How long until Doctor Who becomes a full, rather than an episode-by-episode, coproduction between BBC Wales and BBC America? Series 8? It's going to happen. It's really only a question of when.