I think last nights finale was a right cop-out. Killing off main characters is normal for Spooks, so killing off (has everyone watched it yet?) was hardly shocking. What would have been genuinely surprising would have been a sunset ending.
Still, it does at least leave the door open, just in case.
Nice to see Tom Quinn back as a freelance deniable operator, even if it was only for about 5 seconds of screen time.