With the fate of Empirical on the line, Liza considers leaving the company as her relationship with Charles forces him to make a crucial decision.

In a last-ditch effort to save the company, Charles takes Empirical and Millennial to a book fair in Germany where Liza receives an offer that could uncomplicate her life.

Josh celebrates at his launch party, Liza is tired of keeping secrets, Caitlin's new boyfriend raises eyebrows, and Diana meets a challenge head-on.

Kelsey and Liza find themselves at odds when a billionaire pitches a book on power to Millennial.

Liza adjusts after the holidays. Maggie confronts buried issues.

At Christmastime, Liza must attend a party with her ex-husband, Kelsey struggles to keep both her relationships under wraps, and Charles glimpses Liza's other life.

Kelsey is torn between Jake and Zane, Liza helps Charles retrieve an eccentric rock star's manuscript, and Diana ventures to Staten Island.

Liza worries about her daughter's online activities, Kelsey's relationship with Jake crosses a professional boundary, and Josh contemplates a long-term decision.

Liza gets to know a charming journalist and confronts Charles, Diana agrees to a date with a familiar face, and Josh wants a reset.

Liza faces complications on the "Marriage Vacation" book tour; Kelsey and Zane head to Washington, D.C., to court a speechwriter's prospective memoir.

Liza and Kelsey seek out a potential business partner for Millennial; newlywed Josh returns to Brooklyn; Charles sees Liza with fresh eyes.

Liza returns to Empirical hoping to resume business as usual; Charles announces a new project that spurs several unsettling revelations.