Which episode is listed as Mad Men's 85th overall episode?

Mad Men’s 85th overall episode is “Waterloo.”

“Waterloo” is season 7’s seventh episode and originally aired on May 25, 2014. It was written by Carly Wray and Matthew Weiner, directed by Weiner, and serves as the midseason finale of the show’s first batch of final-season episodes.

The episode is set against the Apollo 11 moon landing in July 1969. At Sterling Cooper & Partners, the partners confront the possibility of losing control of the company as McCann Erickson moves toward an acquisition. The business crisis parallels major personal and institutional turning points.

The title evokes defeat and upheaval, but the episode also contains moments of renewal. Bert Cooper’s death, Don Draper’s return to the creative center, and Peggy Olson’s changing authority all reshape the agency. “The Strategy” is episode 84, while “Time & Life” and “Lost Horizon” come later as episodes 89 and 90.