Elementary creator Rob Doherty released a message following last night’s episode. Find out why it was [spoiler]’s time to go.

Spoilers ahead for Elementary season 3, episode 12, “The One That Got Away.”

Over the past few weeks this writer questioned CBS’s decision to keep Kitty Winter in the background of the promotional material. Each week the promos introduced the cases as problems for “Holmes and Watson,” to solve. Yet, each week, Kitty’s role as an investigator continued to grow.

But as the past two week’s Elementary episodes aired, the answer became clear; Kitty was never meant to stay.

Creator and executive producer of Elementary, Robert Doherty, sent out a statement following the episode explaining why Kitty Winter’s time was at an end.

We’re going to miss Kitty as much as Sherlock and Joan will. But with her departure, it’s time to turn the page to the next chapter for Sherlock and Joan. Even as their working lives drift back to a familiar arrangement, they find that they’ve changed. The partnership has to evolve… and it has to evolve quickly because old foes and new cases will be coming at them before they’re ready. Periods of transition are tricky, dangerous times.

The show was never about Jamie Moriarty sticking around. Her reappearance in Sherlock’s life tested the man he and Joan worked to build. The same can be said of Mycroft Holmes. He was not meant to take Joan away and live happily ever after. He served a greater purpose of pushing Sherlock and Joan apart while having them.

Kitty Winter arrived to erase the wedge that Mycroft left. Sherlock is stronger and better for having her in his life. As we saw last night, the feeling is mutual. Kitty and Sherlock found each other when they needed it most, but the relationship was not meant to be forever.

For now, Kitty Winter joins the ranks of characters that we hope stop by the brownstone sooner rather than later.

Check out our recap of Elementary season 3, episode 12, “The One That Got Away,” for all the details of Kitty’s departure.

Watch Elementary season 3, episode 13, “Hemlock,” Thursday, February 5 at 10:00 p.m. ET on CBS.

Are you going to miss Kitty?