"Mad Men" season 7 mid-season finale airs tonight - find out where to watch the "Mad Men" season 7 mid-season finale via a free live stream online of AMC. Don Draper will turn to the bottle after he leaves Sterling Cooper Draper Pryce, reports BreatheCast.

To watch the "Mad Men" season 7 mid-season finale titled "Waterloo," click here!

The episode synopsis reads: "Don receives a troubling letter; Pete butts heads with Cutler; Roger gets an unexpected phone call; and a risky venture entails a new future for Peggy."

This is the last "Mad Men" episode of the year, as the series' last 14-episode season is divided into two segments. The first seven episodes, which started on April 13, 2014, is titled 'The Beginning.' The second half titled 'The End of an Era' will release in 2015.

According to BreatheCast, Don Draper goes into a drinking binge after he leaves Sterling Cooper Draper Pryce.

Meanwhile, an infuriated Megan leaves her husband and New York, choosing to continue her acting career in Hollywood. While she is onboard a plane with Pete's girlfriend Bonnie, it appears the plane will have severe turbulence, the website reports.

Catch the cliffhanger "Mad Men" season 7 mid-season finale tonight, May 25 at 10 p.m. on AMC!

Speaking to the Huffington Post, John Slattery, who plays Roger Sterling on "Mad Men" season 7, gave some spoilers about the series finale.

"The best part of the show is you think you know where it's going, but you don't know where it's going, and that's the best part about it. Your mouth is hanging open by the end of an episode or a season and you think, 'That's not what I expected,'" Slattery said, IB Times reports.

"That's why [creator] Matt [Weiner] is as good as he is. He knows because he knows what the audience wants -- you know, Joan and Roger -- that's not what he's necessarily interested in. That isn't to say that he's not going to give the audience what they want, but it's much more interesting to expect one thing and get another.

"And I don't think it's a waste of time if you don't get what you want," he added. "He's that good at setting up a story. I've stopped second-guessing. I think most of us on the show have stopped trying to figure out where it's going to go, because it never goes where you think it's going to go."