A new series of this dark conspiracy thriller arrives tonight with a rake load of new cast members, including Rose Leslie (Ygritte of Game of Thrones). She plays Agent Milner in this opening prequel episode set in 1974 where she meets a young scientific genius named Philip Carvel at a secret forum of political, industrial, financial and academic leaders. (As you do.) Milner is in charge of a powerful shadowy organisation known only as The Network. Together they hatch a radical plan they believe will save the human race from the horrific ramifications of over-population. Right, good luck to ye lads...