when does the merger happen in grey's anatomy

Six years ago, Alyssa Moss lost her voice in a car accident and was led to believe that her husband, Caleb Wood, had cheated on her with Mandy Shaw. Crushed and betrayed, she faked her death and disappeared. Now, she returns as Anna, a renowned architect, with her son, Connor Wood. But when she unexpectedly crosses paths with Caleb and Mandy, she must hide Connor's true identity. When Connor is kidnapped, Alyssa and Caleb join forces to rescue him—only to discover that every lie and heartbreak between them had been orchestrated by Mandy all along.

In her past life, Celeste found out the girl she'd been sponsoring, Renee Hopper, was actually her husband Larry's secret daughter. When she confronted him,Celeste and her daughter Sherrie were killed by Larry and his mistress.Reborn, Celeste exposed the affair and kicked them out. Renee, unwilling to back down,tried to ruin Sherrie's name—but was stopped just in time by Sherrie's real father, Nathan Sampson. In the end, Renee and her mother were disgraced and driven out.

Dorian Valmont, crown prince of the ancient Navorin era, awakens as a 6-year-old child in modern times after a drunken accident. With ancient wisdom hidden behind a child's face, he outsmarted every adult in the decaying Valmont family, tore down their corrupt legacy, and built a new empire from the ashes. Just when he's about to claim his rightful place as the head of the family, new enemies emerge from the shadows. Now, a storm is brewing—one that threatens to destroy everything he's built and expose the thousand-year-old secret he carries.

Raised by the Yoners, Autumn discovers she's not their biological child but the heiress of the prestigious Yale family. The real Yoner daughter, Vivian, now a destitute beggar, is manipulated by a vengeful former housekeeper to disgrace the Yoners. When Autumn is betrayed and confined by her adoptive parents, Xenith Yale emerges, offering support and encouragement. Together they unravel the conspiracy, restoring Autumn's rightful place and finding love amidst turmoil, while Vivian and her accomplice face their comeuppance.

After the werewolf leader Akasha was forced into suicide by the vampire Eric, her soul was transferred into the body of a recently deceased girl by the Grim Reaper. The Reaper offered her a deal: if she married Eric within 49 days, she could be brought back to life. Reluctant at first, Akasha's resolve hardened when she learned of her family's fate at the hands of the new leader, Francis. Driven by vengeance, she reluctantly agreed to strike a bargain with the Grim Reaper.

Elise Pierre, a university student, has just stepped into the society when she accidentally spends a night with Louis Denton, a CEO who is known to be allergic towards women. A month later, at a career fair, their paths cross again in an unexpected twist of fate. While Louis initially assumes Elise is a gold digger, he arrives just in time to rescue her from being married off to an older man for a bride price of $100,000. When Elise opens her eyes again, she finds herself in Louis's luxurious home, where she begins to be enveloped in his love and affection.

In her previous life, Vega married the man she loved—Dylan—only to be betrayed. For the sake of his first love, Dylan drained Vega's billions and even allowed his mistress to plot against Vega's entire family.Reborn, Vega returns to the moment she must choose a husband. This time, she decisively marries Ian, a principled and upright man. When Dylan realizes Vega didn't choose him, regret hits him like a tidal wave...

Natalie was once the Parson family's cherished daughter, but her world was shattered when Monica was unmasked as the true heiress. Manipulated by Monica, she was framed for their grandmother's murder and cast out by her family to a hellish reform school. Two years later, she was released, only to be forced into a marriage with a notorious alcoholic playboy. As the truth about her past and the horrors of that "school" come to light, Natalie watches everyone with a cold stare. Her storm of revenge has just begun.

When Lila impulsively kisses a stranger to get back at her cheating ex-boyfriend, she has no idea she's just locked lips with Colton Denizen, a billionaire and her esteemed college professor. As sparks fly, their passionate yet secretive relationship leads them into a thrilling adventure. Together, they must unravel the mystery and bring down the elusive Rogue King. Lila and Colton's bond is tested in ways they never imagined. Will their love survive the secrets and perils they uncover?

18-year-old Lila, deemed worthless for her inability to shift, faces betrayal from her boyfriend and sister, followed by her own father's attempt to kill her. When she meets Victor, the Alpha feared as the 'brutal monster,' both a fated romance and her dormant powers begin to stir…

Jared Steele spends ten years composing hundreds of hit songs for his wife, Chelsea Locke, turning her from an unknown singer into a music queen. He loves her deeply, but discovering her with Dean Graham, his mother’s illegitimate son, shatters him. Enraged, he revokes all her song rights. Chelsea sees it as a game, pushing his limits—until her thousandth concert, when a lawyer’s notice confirms the revocation.

Yuna Sanders' world shattered when she discovered her husband's infidelity. Seeking solace, she made a reckless decision, and what began as a fleeting escape from heartbreak quickly escalated. The other man became dangerously obsessed, pulling her into a world of nightly encounters.

Yoel wrongly believes his mother,Zina,caused his father's death and drove his girlfriend to suicide, so he creates the Memory Helmet to get revenge. But when he reads her memories, he discovers she carried the gambling debts alone,supported his business, and even donated bone marrow to save him. Overwhelmed with guilt, Yoel realizes the truth. When his mother falls gravely ill because of him, he finally awakens—but suffers a mental breakdown. Through it all, she never abandons him, and the family finally finds warmth and reconciliation.

Sharon Lucas had two adopted sons, and she had raised them all by herself. One day, she heard that she'd get $5 million relocation compensation for her old house. But her sons accidentally pushed her into the pool when arguing over the money. The next minute, a man showed up and saved her. When the man woke up at the hospital, he had already lost his memory. So, Sharon took him in and gave him the name David. But actually, David was William Lester, the chairman of Lester Group, and he faked the amnesia, trying to investigate Sharon's identity.

Yvonne Birch and Gerald Lawson have been married for three years with a lukewarm relationship. Things take a turn when Gerald's first love unexpectedly returns. Gerald decides to divorce Yvonne, prompting her and her best friend to catch him in the act of infidelity. It's only at the moment of divorce that Gerald realizes he never truly understood his wife. Regretful after the divorce, he desperately tries to win her back, leading to a dramatic pursuit.

In her previous life, Vega married the man she loved—Dylan—only to be betrayed. For the sake of his first love, Dylan drained Vega's billions and even allowed his mistress to plot against Vega's entire family.Reborn, Vega returns to the moment she must choose a husband. This time, she decisively marries Ian, a principled and upright man. When Dylan realizes Vega didn't choose him, regret hits him like a tidal wave...

One furious punch, one ruined masterpiece, and she’s humiliated as ‘frigid’ before the crowd. But when Rosa, in a blaze of fury, crushes her lips to a stranger, the unthinkable happens: Tristan, the aloof billionaire everyone calls untouchable, gets hard from her kiss… and now he wants more.

18-year-old Lila, deemed worthless for her inability to shift, faces betrayal from her boyfriend and sister, followed by her own father's attempt to kill her. When she meets Victor, the Alpha feared as the 'brutal monster,' both a fated romance and her dormant powers begin to stir…