On a special day for the Mularkey family, Tully reflects on decades of work, love, grief and joy alongside her best friend. Kate faces the unknown.

A bridal shower stirs up resentments and memories, an awkward encounter leads to a life-changing question, and a tragedy shakes teenage Kate's world.

Tully, Johnny and Marah try to find ways of coping after Kate's revelation. In the 1980s, Johnny wrestles with another piece of overwhelming news.

For the first time in decades, Kate and Tully experience a year apart — but can they handle major life events without each other?

Kate and Johnny's loved ones gather for two very different celebrations. Tully gets tangled in a romantic dilemma, and Kate feels the weight of a secret.

From bra-stuffing to breastfeeding, Kate experiences several bumps in the road on her journey from a self-conscious teen to a first-time mother.

Johnny and Kate reminisce at a party about a life-changing kiss in the same newsroom, 20 years earlier. Tully gives Danny advice on his love life.

As Tully's career takes off, uncomfortable encounters at work keep throwing her off track. Johnny's behavior causes concern among his loved ones.

Sneaking out to a school dance, breaking a news story and enjoying a hip-shaking night on the town, Tully and Kate whirl through life together.

A traumatic assault. A hidden romance. A signed consent form. Secrets both shared and unspoken test Kate and Tully’s friendship over the years.

Kate experiences the force of nature that is Tully when they meet as teens, at their first journalism jobs in 1982 and over a PTA crush in 2003.

The BFFs catch the attention of a school bully. Kate attempts to move on. Tully faces choices that could change her life personally and professionally.

Tully and Kate weather health issues and romantic entanglements, from a college dalliance to a steamy encounter that leaves an ex hot under the collar.

A teen magazine. A political investigation. A secret message. Shocking revelations lead to major questions for Sean, Tully and Kate.

Tully attempts to face unresolved loose ends from her past. But her choices lead to a potentially unforgivable mistake that impacts Kate's life.

From a double date in 1975 to Tully's search for her father in 2004, Tully and Kate attempt to take charge of their futures — but fate has other plans.