Entertainment Tonight ET Online ETOnline.com

Mad Men took audiences to an American Cancer Society gala in last night's episode, titled At The Codfish Ball, and it's safe to say the night's most memorable moments went down at the dinner.

PICS - Mad Men Stars Get Glam

Now, ETOnline has an exclusive rewind of the party -- and the scandalous antics that transpired inside the celebration.

From Don becoming persona non grata in the ad world to Sally's eyeful of guest star Julia Ormond (playing Megan's mother), relive the night's most memorable moments above!

Mad Men airs Sundays at 10 p.m. on AMC.