Probably due to the fact they're filming in Africa. The reason I brought up Scrimshaw pirates is because like Outcasts it was apparently commissioned years ago and hasn't made it to the screen yet, whereas Atlantis isn't something that's been previously announced as far as I'm aware.
Word to the wise, or anyone who's interested: Radio 4's just started a follow-up/side series to Silk, centred on the clerks rather than the barrister's (so Billy, Jake and Bethany are the main characters carried across). 2.15pm on Tuesdays.
Yep. Quite a few big British and American shows are being filmed in Ireland nowadays. They're hoping to attract them here with a tax break for high end drama costing more than £1.5m per episode. Or something like that.
Both Line of Duty and The Fall were I believe, though in the latter case the story was set in Belfast, whilst the former is supposed to be an unnamed British city.