The new edition of Dreamwatch magazine confirms that P.J. Hammond's episode "Small World" has moved from its current position in the Torchwood schedule. It's no longer episode three due to "effects requirements" and the writer predicts that it'll now be moved to "around episode six". This is the biggest indicator we've had that this episode will now form part of block three. We'll bring you more news on the other episodes as soon as we get it.
Meanwhile, our episode guide has been updated to include the changes.