Could anyone tell me the ending to a recent CSI episode?

It was the one about a girl called Natalie who pushed her sister out of a tree house. She makes miniture replicas of crime scenes. She left one of Sarah under a car and the team chased her and caught her in a crowd of people. This is where my tape stopped as I had taped it to watch later. Can anyone tell me what happened after. What happened to Sarah and why she did all this?

"This time, it's different. It's personal. "This girl holds me responsible for the death of Ernie Dell. I took away the only person she ever loved, so she's going to do the same thing to me." The CSIs can only stare at Grissom in shock, barely able to grasp that Grissom is in love with Sara. But Grissom is past that, thinking about Natalie's motivation. "This isn't about a psychotic reaction to bleach, or her dead sister鈥?quot; He runs from the room directly to his office. Still on the laptop screen is a website for hobby auctions, and he knows exactly which handle is hers. "Noturlittlebisquedoll"--it refers to the words "little bisque doll" from Christopher Davis' creepy stage song. Grissom races to find out the information about the user.

Sofia and a team of cops bust down the apartment door, and Natalie bolts for the window. She disappears into the crowd, confused and overwhelmed. Moments later Warrick and Nick nab her, dragging her away.

Natalie is alone in the interrogation room, and Brass is ready to drip bleach on her till she talks. But Grissom wants to speak to her alone. He enters, introducing himself and flattering her artistry. "I've been a crime scene investigator for over 22 years and worked over two thousand homicides. You are by far the best I've ever seen." She watches him, interested. As he describes her final crime scene, her smile fades. When Grissom infers that she killed Sara, she shakes her head no. But she's angry. "Her, her, her. It's always about her," she yells, pulling a razor from inside her mouth and slashing at Gil's throat. Blood spills out, liquid and hot. He's dying鈥?br>
But it was only a hallucination. She's slipped into a delusional state, singing the song her father performs about his Little Bisque Doll with a pain in her sawdust. "Tell me where Sara is!" Grissom shouts. He gets no reply.

Somewhere in the desert, Sara is trapped under a car, alive. It's raining, and there's no way out." *

To Be Continued...

* From CBS (Living Doll, season 7 episode 24).

nick and warrick caught her. She kidnapped Sarah because she was at a different crime scene and saw Gil and Sarah lovingly touching and she thought Sarah was distracting Gil. she was arrested and Gil was talking to her and she was having fantasies about stabbing him in the throat with a pen or something. It was the final episode of last season, the first episode was of them trying to find Sarah. of course she got out from under the car by herself in the flooding. they finally found her wandering in the desert.