Season 4 was by no means my favourite but the finale was a lot of fun.

Don marrying his secretary was a total WTF!? moment but it actually fits. Why marrying the smart challenging woman when the dipsy one just sits outside the door. It worked once, it'll work twice.
Having said that I actually like Megan she's fun and even though I never liked the doctor I felt bad for her.
There were a lot of nice scenes here.
Don and Betty in the end was really nice and I think they're not done yet.
I know Betty gets a lot of hate but I like her and I can relate. Of course she's a moody bitch, this was supposed to be her time; Having it all, the husband, the kids and the money and Don out in the rain.
Instead she has some boring old guy on her hand and is stuck with children who act out and Don is living the high life shagging around the block.
I'd be pissed off too.
I loved the little scene with Peggy and Joan after they learned of the engagement.
It was so sweet, for the first time they were together as equals. Peggy finally realizing that all her efforts will always be in vain and nothing will ever be as important to men as a pretty face.
Something Joan has known all along.
Joan being still pregnant was not really a surprise, like really not.
Also I know I'm boring with my Ken praising but he is so cute.
I love his whole character he was so good with Peggy, they have great chemistry and his carefree and yet totally confident attitude is awesome. The way he just took a stand for valuing his personal life more than his professional life totally unfazed and not without giving Pete a side blow was the highlight of the episode.

So now I have to catch up with episode one of season 5 and I'm back on top of things.