3x01 Whitechapel Terminus
The Amazon-saved series returns to BBC One later this month... so I'm finally getting round to watching it on Amazon. Well, I watched the first two series months after they aired, so it's only right. It's at least as good as ever, which is nice, and by jumping ahead four years it's almost like a mini-reboot. Leaves you feeling a bit dazed if you can't quite remember how the last series ended, but on the bright side it does (eventually) recap anything you need to know.