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.

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

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.

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.

Vows are made and hearts broken as Kate navigates her long-strained relationship with her brother, and Tully grapples with compromise and commitment.

Over holidays past and present, relationships shift — and truths are spoken — as Tully and Kate reshape their expectations for what the future holds.

Trying times bring Kate and Tully together as they contend with an overbearing grandma, a pesky new intern and an ex-husband in distress.

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

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.

While celebrating their own freedom on Independence Day, Tully and Kate learn time and again that relying on each other may not be so bad after all.

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.