Floyd takes action and Charlie tries to prove himself. Peggy and Ed disagree about what to do next and Lou is sidelined during Ronald Reagan's campaign tour.
Cole and Cassie learn that the doctor who knows the location of the Night Room died in Haiti in 2014. Cole is sent there to find him before he dies knowing that Cassie was there too and that running into her could corrupt her timeline. In 2014, Cassie goes to Haiti thinking that the outbreak there could be the virus Cole warned her about the previous year.moreless
Dr. Alvin Wayne causes panic after walking in on the wrong day for a procedure he will assist in. Everybody wonders if his cognitive skills need checking. After swimmer has a seizure an interesting diagnosis is found.Tina needs help with a procedure and Sidney may get in trouble after a doctor misses a diagnosis in a former patientmoreless
When a man dies from poisoning after eating breakfast in the Division 1 Cafe, Jane and the team search for the source. Korsak meets up with one of his ex-wives. Tommy wants proof that he's the biological father when Lydia returns to take back the baby.moreless
Opportunity is in the air for everyone and Pete meets a stranger on the train.
Roger puts on his entrepreneur hat; Don asserts himself over his colleagues; Sally gets in over her head.
Peggy becomes angry when she is forced to keep a secret she doesn't want to keep; Pete sticks his neck out for a friend; Don receives surprising news.
Megan throws Don a surprise birthday party, the war between Pete Campbell and Roger Sterling intensifies, and new mother Joan begins to wonder if she still has a job when she's ready to come back.moreless
Lane finds a wallet in a cab and decides how to handle it. The fallout from the party leaves Don and Megan upset. Joan has a hard time dealing with her mother.