Sullivan’s Crossing Season 4 has officially arrived, and if the brand-new trailer is any indication, the quiet little town in Nova Scotia is about to be turned upside down once again.

Just days before its premiere on The CW on April 20, 2026, the official trailer dropped — and fans are already losing their minds over the jaw-dropping twist teased at the end of Season 3. The biggest shock? A shocking revelation about Maggie Sullivan’s biological father that threatens to shatter every relationship she’s fought so hard to rebuild.

For three seasons, viewers have watched neurosurgeon Maggie (played by the talented Morgan Kohan) return to her roots at Sullivan’s Crossing after a career-ending scandal in Boston. Her complicated bond with her estranged father, Sully (Scott Patterson), formed the emotional heart of the series. But with Patterson’s character now absent in Season 4 (reportedly heading off to Ireland with Helen), the focus shifts dramatically to Maggie’s personal life and the hidden truths bubbling beneath the surface of Timberlake.

The trailer hints that a long-buried family secret about Maggie’s true parentage is about to explode into the open. Whispers of hidden letters, old betrayals, and shocking DNA-level revelations suggest that the man Maggie has always known as her father may not be who she thought. This bombshell doesn’t just affect Maggie — it ripples through the entire close-knit community. Relationships will fracture, loyalties will be tested, and the peaceful life Maggie has been building with Cal Jones (Chad Michael Murray) could crumble under the weight of the truth.

Adding even more fuel to the fire is the reappearance of Liam, Maggie’s secret ex-husband from her impulsive past. The Season 3 finale left fans stunned when Liam showed up, revealing that Maggie had never fully disclosed her brief marriage. Now in Season 4, that secret marriage adds intense tension to her renewed commitment to Cal. Trailer scenes show heated arguments, emotional confrontations, and Maggie torn between her present happiness and a past she desperately tried to leave behind.

Meanwhile, Maggie is trying to move forward professionally. She’s eyeing a new direction for her medical career, possibly opening a general practice right in Timberlake, while helping the town heal from previous crises — including supporting Edna’s recovery after brain surgery.

But with Sully gone and family secrets exploding, can Maggie hold everything together? The trailer suggests the town itself may never be the same. Old alliances could break, new romances might spark, and long-standing grudges could resurface as residents take sides in Maggie’s unfolding drama.

Fans of heartfelt small-town stories mixed with juicy soap-style twists are in for a treat. Sullivan’s Crossing has always excelled at blending romance, family drama, and community warmth, and Season 4 appears ready to crank the emotional stakes higher than ever.

Will Maggie finally confront her real origins? Can her relationship with Cal survive the chaos? And how will the revelation about her father reshape the future of Sullivan’s Crossing itself?

One thing is certain: after this season premiere, nothing in Timberlake will ever feel quite the same again. Grab your tissues and settle in — the Crossing is about to get a lot more complicated.