How did Johnson, Masters, Libby and Keller end up at the same party?
That was a key question on Masters of Sex Season 4 Episode 4 when Nancy and Art threw a huge party.
Things changed for every single person at the party as the night wore on, and the group were forced to face the harsh light of day after the events of the previous night.
Use the video above to watch Masters of Sex online to get caught up with the latest drama on this stellar Showtime series.
Paul Dailly is a staff writer for TV Fanatic. Follow him on Twitter.