It is, quite by accident, season finale day!
Have I Got News For You
43x09 (8/6/12 edition; extended repeat) [season finale]
[Watch the extended version (again) on iPlayer.]
5x13 The Phantom [season finale]
Alongside episode 12 I posted an interview with series creator Matthew Weiner in which he not only discussed the season so far but promised to talk to them again after the finale. And he did, and that's here. There's also Digital Spy's verdict on the finale here.
As various people have noted, this a very low-key finale, but still high-quality. Less of a cliffhanger ending than they've made the last few years, but I'm always excited for more Mad Men anyway.
1x12 Episode 12 [season finale]
Or as I like to call it, the Romanzo Crimfinale! ...I'll get my coat.
Helluvan ending, though. Even more excited for the second series now.