Pete facilitates Joan's controversial business decision to secure the Jaguar accont. Peggy quits SCDP to become Copy Chief at CGC.
Don confronts Lane about the forged check. Glen visits Sally, who gets her first period and runs home. Lane commits suicide in his office.
Peggy is taken off the Heinz account. Don leaves Megan at a HoJos then spends the night searching for her. Roger takes LSD.
Abe asks Peggy to move in together. Megan saves the Heinz account. Don receives an ACS award while Sally walks in on Roger and Marie.
SCDP struggles to land the Jaguar account. Ken's secret writing career is exposed when Pete hosts a dinner party. Lane and Pete brawl.
Megan plans a surprise birthday party for Don as Pete and Roger butt heads and Joan clashes with her mother about returning to work.
Harry helps Paul, who is a Hare Krishna. Lane forges a $7,500 check. Don and Joan bond after she's served divorce papers.
Greg returns from Vietnam but Joan kicks him out when he re-enlists. Don has a fever dream. Peggy bonds with Dawn.
Don has a tooth removed. Pete visits Beth in the hospital, then fights with Howard on the train. Megan gets a commercial role.
Pete begins his affair with Beth. Megan quits SCDP to pursue acting. Peggy botches the Cool Whip presentation.
Don competes with Ginsberg on the Sno Ball pitch. Jane accompanies Roger to a client dinner. Sally confronts Megan and Don about Anna.
An overweight Betty faces a cancer scare. Ginsberg is hired. Don and Harry try to sign The Rolling Stones for Heinz.