I didn't get started on Mad Men until last year. That's usually the way I do things - ignore the series when it first comes out, let it run for five or six years, stop, and then I pick it up on reruns and watch every episode from start to finish. I did that with both Seinfeld and The Sopranos.
I have Netflix, Vudu and Huluplus. I was able to watch Seasons 1-4 on Netflix. That's where Netflix stops. Huluplus doesn't have Mad Men any more. I didn't check Vudu and ordered Season 5 on DVD from Amazon. 38 bucks or some such. OK - well and good. The day after I did that, a co-worker told me that Vudu does have Season 5. Of course, you have to pay for in on a per-episode basis, and it comes out to about the same price as the DVD's I ordered.
Anyway, I am waiting for Season 5 to arrive and will sop it all up as soon as it does.
I'm sure you all know that Robert Morse starred as J. Pierrepont Finch in "How to Succed in Business Without Really Trying" on Broadway when he was a very young man. "How to Succeed" opened on Broadway in 1961.
The producers of Mad Men love to leave viewers hanging as to when a new season will begin. That's what is happening this year. Of course, there will be a Season 6. Word is that it will commence "some time this spring," with the actual commencemnt date anticipated as being much closer to the early part of Sring than the later part.