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Tear Jerker: The Originals
The Fate of Katie and Thierry. Two Star crossed lovers caught in Klaus' plans. Katie ends up with her neck snapped and Thierry ends up entombed for the next one hundred years. The worst part was Thierry was willing to walk to his doom with some dignity. But after Katie's death, he ends up sounding so defeated.
Cami begging Klaus not to basically MindRape the trauma of the Murder-Suicide of her brother, because it is a part of what makes her who she is. Both are in tears over this violation. The worst part is that Klaus was trying to do something nice for her.
The Sowing for the Harvest Ritual: three witches killed, including Sophie's niece Monique while Davina and Sophie tried to stop it. Had Marcel not intervened, Davina would have been dead as well.
That's not all either: after the Harvest Ritual, the four young girl witches were supposed to resurrect, though Sophie didn't believe it at the time. She changes her mind afterward when she noticed it was working and when Jane-Anne tells her that with Davina still alive, none of the other girls will resurrect, which includes her daughter Monique. If Davina isn't killed before time runs out, then Monique would have sacrificed herself for nothing. Guilt-ridden, Sophie vows to her sister to finish the ritual and bring Monique back whatever it takes, and together, they set up the plan that became the premise of the show. A plan that cost Jane-Anne her life, and may very well cost Sophie her own.
Davina retelling of the Harvest to Elijah is told in a borderline broken monotone, sounding like a victim of PTSD. She then reveals on that day she lost her faith in her people. People like her mother and others who just stood there as their daughters begged not to be slaughtered like animals And her fear that if they lied about the Harvest itself, how can she trust them in regards to the supposed resurrection? In the end the plain fact is she doesn't want to die..
Hayley finds out that her baby's blood can be used to sire hybrids, and assumes that that's the only reason Klaus is interested in his child. When Elijah and Hayley confront him about it, he actually looks hurt. It's not unreasonable to assume that of someone like Klaus, but in this one instance, he genuinely cares about the baby and concludes his heartbreaking speech about how even his own child will see him as nothing more than a 'bastard'. And then he bites Elijah's neck.
The Funeral for Marcel's people who decided to stand with him against Klaus. Diego and others is dousing bodies with alcohol for a funeral pyre while Marcel looks on mournfully and a haunting funeral dirge is played by Sax.
Elijah's howl of anguish as he clutches the body of his lover Celeste. The memory of it (and how deeply he loved her) affected him so much that while sick with fever from Klaus' bite, his time with her was what he hallucinated amongst all his other memories.
After Klaus found out about Marcel and Rebekah's relationship, he daggers Rebekah for fifty-two years. It's bad enough that Rebekah has to deal with the fact that her own brother essentially took a generation of life from her. But that's not what makes her break down: it's the fact that Klaus tells her that he offered Marcel a deal - hold onto his love for Rebekah and live his days as a human, or renounce her and become a vampire. Right on cue, Marcel walks in...not a day older than the last time she saw him.
Klaus confronting Elijah and Rebekah about their respective betrayals (him believing Tyler's claims about a plan to use the baby to make hybrids, her plotting against him with Marcel) at the end of "The River in Reverse". He wasn't just angry, he was so genuinely hurt, he actually shed tears.
Davina weeping over over the dead body of Tim who Klaus just used to poison Davina as a back up plan. He intended her to be killed as well but Marcel had a back up plan to his back plan. She ends up begging him to wake up, and basically watches the last bit of normal from her past life die in front of her.
The Episode Après Moi, Le Déluge had quite a few:
Marcel is comforting a dying Davina as she is making a choice to complete the Harvest in order to prevent destroying New Orleans when she overloads.
Davina: "Marcel, it's okay."
Marcel: "No, I failed you..."
Davina: "I'll die whether I do this or not. Now, the only option is whether I take everyone with me. If you look at it that way, it's kind of selfish not to do it."
Marcel: "There has to be another way; this is not the way it ends!"
After a year struggling, wrecked with guilt at her intervention preventing the original Harvest and the cost of her sisters life. Sophie Ann has completed the Harvest and can finally resurrect her niece via the reaping.
Sophie Ann: "We call upon the Elders to resurrect your chosen ones."
Nothing happens, and we cut to the still dead bodies of the girls. Marcel, Klaus, Hayley, Rebekah, and Elijah search for signs of life from the girls.
It gets even sadder for her afterwords. In the next episode, we find her drowning her sorrows, and in the episode after that she finally meets the apparently newly resurrected Monique... only to try to get her out of town and to safety in vain. The episode ends with Monique, of all people, killing her Aunt Sophie, citing a lack of faith on Sophie's part for the reason before walking off with the Big Bad Duumvirate of revenge-obsessed witches. At this point, Sophie's eight month long tragic quest comes to a tragic end.
1.14 gives us Rebekah: alone, sick with werewolf venom, running through a creepy-ass Abandoned Hospital in a futile attempt to stop Genevieve from showing Klaus that she and Marcel had conspired to bring Mikael to New Orleans in 1919.
Genevieve deserves a mention here as well. Before becoming twisted and cold with vengeance, the flashbacks in this episode showed that she used to be a sweet, naive girl who made the honest mistake of trusting Rebekah's overtures of friendship. Once Rebekah got cold feet about summoning Mikael, and Genevieve told her the spell was irreversible, Rebekah infected her and her friend (who had been possessed by Celeste) with influenza. Then she compelled the orderlies to put the women in quarantine until they died horrible, bloody deaths from the disease.
Klaus' reaction when he sees the truth. He howls and cries, but as Genevieve shows him more memories, his anguish becomes more muted. He's on the verge of tears throughout. And then he picks up Papa Tunde's knife and goes hunting for Rebekah.
And again when Elijah shows up and stabs him with that same knife before he can do the same to Rebekah. The look on both their faces...this is going to be an event that will make or break this family.
And Episode 1.15 makes this even worse. In the flashback of the day Mikael ran the Originals out of New Orleans, Klaus had finally given his blessing for Rebekah and Marcel to be together. Their betrayal had ultimately been for nothing.
The flashback of Rebekah in the aftermath of Mikael driving them out of New Orleans. She's stricken with grief and horror at what she has done, and the consequences of it (i.e Marcel apparently burning to death in the opera house).
Even though she was ultimately done in by her own hatred of the Originals, Celeste may have ultimately won, as the episode 1.15 ends with the Originals staring each other down. Klaus with an indestructible white oak stake (the only thing that can kill an Original vampire) and going full hybrid, with Elijah and Rebekah on the other side gearing up with Papa Tunde's knife as their weapon. One thousand years, and ultimately the three siblings seem to have reached a point of no return.
1.15 is one big Tear Jerker for the Originals themselves. The flashback had shown that Klaus had done the impossible and had united all the supernatural and human factions in town, Rebekah and Marcel can finally be together, and the siblings are finally happy. Then Mikael comes to town and destroys their home and everything they'd built since they arrived centuries ago, in just one night. All they can do is flee from their father, having to go through the anguish of losing yet another home. And what makes this particular one sting, is that they thought that they'd lost Marcel as well, the closest person they've called family outside of their own blood.
In the aftermath of 1.15, Klaus and Rebekah realizing that they've suffered too much damage - from their father and from each other - to stay together, even if they still love each other. Klaus allows Rebekah to leave New Orleans for good, and she takes that chance.
The various flashbacks to the Originals' lives before they were turned into vampires. Klaus and Rebekah had always been close to each other since they were children, with Rebekah even going so far as to sneak into Mikael's room to kill him in his sleep for his vicious abuse towards Klaus, which she would have done if Elijah hadn't intervened.
And then there's Davina. As punishment for helping Marcel against the witches, the spirits of the ancestors kept her isolated and alone. While the other three Harvest girls were trained and comforted, she was somewhere 'cold and dark.' And when she wasn't alone, she was tormented by the ancestors and threatened with terrible punishment if she ever uses her powers to help vampires again.