When Bob throws a dinner party to bond with his new friend, Gayle uses the opportunity to introduce the family to her new love interest. Little does she know, Louise has a long-standing feud with Gayle’s boyfriend and her niece will stop at nothing to break them apart. Calamity ensues as Bob attempts to impress his new buddy and the kids take action.

Chuck Rhoades, the powerful U.S. Attorney for the Southern District of New York, is tipped to a case of insider trading with links to Axe Capital and the billionaire hedge fund king Bobby “Axe” Axelrod. This sets Chuck on a collision course with one of the most powerful men on Wall Street. While it could be a career-defining case for Chuck, he must tread carefully, because his wife, Wendy Rhoades, is the in-house performance coach at Axe Capital and Axe’s key confidante. But a costly purchase by Axe gives Chuck the opening he needs, setting off a cat and mouse game where the stakes are high and intensely personal.

When a baby is born with severe deformities of the kind later identified as caused by the drug thalidomide, the midwives find it difficult to handle the situation, and the baby's father rejects her completely, to his wife's dismay. Trixie's new sideline as a keep fit instructor brings her into conflict with Sister Julienne, and she also becomes suspicious of the relationship between Barbara and Tom. Rather than return to Wales as her mother wishes, Delia moves into Nonnatus House.

When Kelly gets invited to her ex-boyfriend's wedding in Mexico, she doesn't want to show up alone - so she decides to bring Cooper as her plus one. But when getting to the wedding becomes a south-of-the-border logistical nightmare, Cooper enlists Neal, Barry, Josh and Leslie to come to their rescue.

Lois and her mom, Babs, have a relaxing spa day, leaving Peter to entertain Lois’ father, Carter. The boys fall for an email scam, and have to go to Africa to get their money back. Meanwhile, Brian pursues Meg’s friend, Patty.

Brett's assignment is to eliminate K.C. but he can't bring himself to follow through; K.C. decides to protect him from The Other Side.

Elizabeth goes to Myanmar to sign a Pacific Rim trade agreement which will modernize their power grid and benefit several of its trading partners, but she is met with resistance by the country’s American ambassador who has immersed himself into the local culture. Also, Nadine attempts to mend her relationship with her estranged son.

Debbie carries a bag of flour around - determined to prove Fiona wrong.

Alicia and Cary join forces to defend a former client facing a multi-million dollar lawsuit over ownership rights to his new music. Also, Alicia’s neighbors are unhappy that her law firm is operating out of her apartment and threaten to evict her.

Sanjay passes his stake in the Kwik-E-Mart to his millennial son, Jay, who turns it into a hip, health food market against Apu’s insistence on tradition. Bart, whom Homer had convinced to give up pranking, is called upon to return to his trickster life and take down the new store.