Disapointed with this season, plotline was meh, the "siege" in the archive was unconvincing and laughable, and not enough Gary Oldman.
I think what this show could really do with is a "prequel" kind of season where we could see how Lamb ended up the the way he is, sadly the other characters barring Standish aren't interesting enough to uncover, plus they're all pretty newish.
I've enjoyed it, but the whole thing kind of falls apart when Lamb isn't on screen, the younger characters lack any depth and they don't convince as people who were ever in the Secret Services.
I understand it's meant to be lighearted and not TTSP or any Le Carre for that matter but even still, to pull off a "spy" drama it has to remain credible.