Thought it was pretty naff to be honest, felt like a crummy filler episode, which are fine, but not as a season opening, and certainly not when you used almost the exact same plot a little while back. They didn't tell us why the villian wanted all these people in the wifi, what/who he was, (though he was played by Richard E Grant when he "appeared" who also played the villian in the last episode), they just sort of took out the HQ then went "Right thats it, nothing to investigate here, lets just head off, no worries that he might start up again else where...
I really think Moffat needs to be taken off the head writing duties, he wrote excelent episodes when he had time to breath, and RTD was in charge, but now he just seems to be suffering a massive writers block, or he needs to get them to extend the episodes to an hour to prevent him just fixing everything in the blink of an eye without any explaination.