American Aviation require security clearance for Don to work with them. He panics when he realises they may uncover his fraudulent identity. Meanwhile Lee Garner Jr tells Roger that Lucky Strike are moving to another agency. Joan goes to get an abortion after becoming pregnant with Roger's baby.
Peggy manages to gain SCDP their first new account since Lucky Strike left. Don takes his kids to California and asks Megan to come along as the babysitter. He then proposed to her. Joan tells Greg that she is having his baby.