when is castiel introduced in supernatural

Quinn Thorne, a club waiter, accidentally rescued Sera Dutt when she was drugged. Quinn is mistaken for an antidote by Sera, who takes half of his necklace jades as a token. Six years later, Quinn works at a Dutt Group construction site to fund his foster mother's medical bills. Mocked by coworkers for being single, he encounters Sera and her daughter, Lila, who calls him "Dad" after recognizing his matching necklace.

Burdened by her father’s debt, Seoyoon ends her relationship with Leejun through a painful lie. While chasing after her, Leejun is nearly killed in an accident. Years later, Seoyoon is raising their child alone, while Leejun returns in triumph. When their paths cross again, old wounds, hidden truths, and unresolved feelings flare back to life, upending everything they thought they’d left behind.

Nora Lloyd, bitter about her illegitimate status, hates her loving father and flees abroad, where she becomes the renowned Scarlet Monarch. When she receives news of her father's death, she returns home filled with grief and regret, only to discover her half-siblings being bullied by other branches of the family. She decides she has had enough of staying silent.

Susan Todd, heiress of the wealthy Todds, was abducted as a child and subsequently rescued by Hans Lawson. In gratitude, she marries Hans, who is now the CEO of Lawson Group. Hans has been searching for the little girl with whom he made a marriage pact back then. Unaware that Susan is the one, Hans forces her to divorce, only to be overcome by regret when Susan reveals her true identity later on.

Sky Fenton and Geoffrey Mooney were childhood sweethearts who promised to marry each other. When they meet again as adults, both have changed their names and don't recognize each other. Yet fate brings them together, leading to a series of amusing encounters. As they fall for each other again, both hesitate due to their childhood promise, not realizing they're actually falling for the very person they promised to marry.

When Hespera's elder legitimate sister Rachel gets pregnant, Hespera is sent to be Rachel’s husband's concubine. But Rachel's delivery day becomes Hespera's death day. Reborn, Hespera plays her cards carefully: she wraps Rachel's powerful father-in-law around her finger, marries him, reclaims her legitimate daughter status, and takes revenge on all.

Nora Lloyd, bitter about her illegitimate status, hates her loving father and flees abroad, where she becomes the renowned Scarlet Monarch. When she receives news of her father's death, she returns home filled with grief and regret, only to discover her half-siblings being bullied by other branches of the family. She decides she has had enough of staying silent.

Bryanna's poor boyfriend cheated on her with her best friend and plotted to sell her to human traffickers. However, fate intervenes when Bryanna mistakenly marries the company's CEO instead of the old man... With a marriage at hand and a grandmother pushing for blind dates, the CEO decides to make the best of it by marrying Bryanna. Initially a transaction of convenience, however, later both of them unexpectedly invest their true feelings...

When deliveryman Ken accidentally saves mafia boss Elle, she falls for him instantly and begins a relentless pursuit. Caught in schemes by his fiancée Susan’s family, Ken faces chaos—including a wedding hijacked by Elle. Later, a plot causes Ken to lose his memory, and with further schemes from the Capone family, he and Elle must overcome danger and conspiracies to reclaim their love and happiness.

His name is Brandon Chester. Once the Unstoppable Warlord, he was imprisoned after an unexpected incident. But prison was no ordinary place—every inmate was a legend in their own right.There,he awakened an overwhelming legacy of power. Upon returning to the mortal world, he became the protector of a top campus beauty. With blade drawn again and again, he rose step by step. And when he finally turned back, the world behind him was already bathed in glory!

At 20, single mom Holly Seth had to deliver food during her maternity confinement to support her son. A year earlier, Jack Blake had saved her from trouble at a school sodality. That accident brought them together. When Jack found out Holly had borne his son, he immediately took them both under his wing with utmost care, and the family of three lived happily ever after.

Ji-Yeon, the wanna-be among the theater majors at school, dreams of a bright future after being cast in a famous director's work. However, her life shatters when her best friend Yu-Mi spreads a deepfake video of Ji-Yeon having an intercourse with Professor Park, and on top of that, has an affair with Geon-Woo, Ji-Yeon's boyfriend. Determined for revenge, Ji-Yeon teams up with the teaching assistant Su-Ho, who exposes Yu-Mi's true identity to her.

On the night she wins Best Actress, Nicole Clark transmigrates into a disgraced noblewoman in Teswil.Plain-faced and powerless, she is bound to a system that allows her to alter her beauty to survive.Desperate to rise, she takes a beauty pill and gains a stunning appearance. In the imperial garden, she meets Logan Hart, and they grow close without knowing his identity. But when the effect fades and her face returns, the shifting appearances spark confusion, and their fragile bond falls into misunderstanding.

Five years ago, Jason Stone was diagnosed with a terminal illness, and his girlfriend ran off with all his money. When he was about to commit suicide, his master, who was passing by Earth, took him to cultivate immortality. A thousand years later, he became a Great Sage, living on an alien world. One day, he finally connected to a spacetime vortex back to Earth, so he risked his life and made it back.

Four years of marriage. One signature—his own—that set me free, though he never realized what he was signing. I was Sophia Moretti, the invisible wife of James Moretti, heir to the city’s most powerful mafia family. But when his childhood sweetheart, the dazzling and privileged Vicky, returned, I finally understood: I had always been temporary. So I played my final move. I slid the papers across his desk—divorce disguised as routine university forms. James signed without a second glance, his fountain pen scratching across the page as carelessly as he'd treated our vows, without noticing he was ending our marriage. But I walked away with more than my freedom. Beneath my coat, I carried his unborn heir—a secret that could destroy him when he finally realized what he'd lost. Now, the man who never noticed me is tearing the world apart trying to find me. From his penthouse to the underworld's gutters, he's turning over every stone. But I'm not some trembling prey waiting to be found. I rebuilt myself beyond his reach—where not even a Moretti can follow. This time, I won't be begging for his love. He'll be begging for mine.

While others survive by hiding, Evan Ryce survives by "collecting rent." In the last luxury air-conditioned apartment, he faces the chaos of his employees:Maya, an SSS zombie who zaps and dances, a security zombie saving crystal cores to marry his neighbor, and more SSS zombies running a moving and delivery biz with 100% reviews. When 30,000 survivors and his freeloading family show up, Evan declares: "Pay the crystal cores—or my zombies will deal with you!"

You've gotten reborn as a tiny sapling in a prehistoric forest.Having survived a millennium of solitude, you've grown into a humongous tree. By chance, you end up saving an ancient clan, who makes you the clan totem and worships you. The flowers you bloom bless the entire clan, allowing them to stay youthful forever while developing super strength. But when war sparks, it's up to you to lead your believers to victory and conquer the prehistoric land.

Kyle Hubert, an executor from the Underworld, agrees to Old Mr. Carter's dying request: marry into the Carter family under contract and protect them for three years.Despite his silent guardianship, the Carter family treats him with contempt and betrayal, ultimately expelling him just as the protection period ends. When the Carter family faces deadly calamity once more, they finally learn the truth about Kyle’s sacrifices and desperately beg him to return.