Klaus' Daughter is a Lockwood?

Klaus' Plan to Attack the Cauldron

  Klaus sits at a desk perusing some papers when his phone starts buzzing. He sees it's Nicole and answers it. "Yes, Nicole what is it love?" Nicole smiles. "Well, father, I believe Aunt Rebekah and I made certain Marcel will be properly distracted tonight." Klaus has a panicked expression. "Dare I ask?" Nicole smirks at Rebekah. "Let's just say his attention will not be on us. We did our bit. What are you doing to ensure Uncle Elijah's safe return?" Klaus smirks. "Currently, I'm preparing insurance against the tenderhearted." Rebekah and Nicole look at each other in suspicion. "Meaning?" Nicole asks. Klaus smirks. "We need proper motivation for Katie to cast a powerful spell tonight. I'm creating that motivation. Marcel has ordered a rousting of the witches. And I, in turn, have arranged for things to go tragically wrong." Nicole frowns at Rebekah. Nicole is afraid for all the people involved in their scheme. Klaus is in the cellar with the nightwalker Max, who has finally had the vervain drained from his body. "You understand what you're to do?" Max nods in agreement. "Good."

Back in the Cauldron; vampires are jumping from the balconies and causing mayhem. Scared witches scream and run away from them. Vampires continue to upturn tables and destroy things while witches scream in terror. Thierry sneaks off through a back door into the Jardin Gris. Katie sees him and runs to greet him with a hug and kiss. "Hey! What's happening out there?" Thierry sighs. "Oh, it's Klaus. He's convinced Marcel that the witches are planning to make a move against him. Marcel wants us to send a message..." Thierry gives Katie an apologetic look as he gently knocks over a shelf full of potion and spell ingredients. "And if he thought I was playing favorites because I'm in love with a witch..." Katie smiles and interrupts him. "Say that again." Thierry smiles. "I love you, Katie. And all this is gonna be okay, I promise." Thierry walks out of the Jardin Gris and bumps into Max, the vampire Klaus compelled earlier, who is about to enter the shop. "I already got that one." Thierry walks away. The vampire goes into the shop anyway.

Thierry hears screaming from inside the Jardin Gris. He turns to see Max dragging Katie outside, where he slams her against the restaurant and bites into her neck. Thierry becomes enraged and lunges toward him. "Leave her alone! Get off!" He throws Max across the courtyard, where he smashes onto a table. Thierry runs over to him, grabs a broken table leg, and uses it to stake the vampire, killing him. The courtyard goes silent, and the other vampires circle around the scene of the crime. Katie is staring at Thierry in horror as he stands over Max's dead body. Diego and the other vampires look at him as though they can't believe what he's just done, and even Thierry is in shock.

Klaus begins to explain his plan to Nicole and Rebekah. "Marcel may not be concerned with Thierry's romantic entanglements; But there are other crimes which he'll be less inclined to so easily forgive... Killing a vampire, for example. That would be unforgivable. If Katie hopes to save her one true love from Marcel's punishment? Well, a rescue mission like that will require something positively magical. But then... what's worth dying for, if not love?" Nicole is overwhelmed with guilt but knows it's the only way to save her Uncle. They were 'collateral damage'.