A possible concise summary is:
The episode of Crime Alert narrates the story of Nisha, a woman who is obsessed with her neighbor and friend Shamita. Nisha feels insecure and jealous when Shamita becomes close to another neighbor, Chandni, who is a yoga instructor and a friendly person. Nisha tries to sabotage their friendship by throwing garbage, ringing the doorbell, and slapping Chandni in public. She also accuses Shamita of having an unnatural relationship with Chandni and insults her in front of her family. Shamita tries to distance herself from Nisha and asks her to get treated for her mental illness. Nisha, in a fit of rage, pushes Shamita from the terrace during a wedding function, but Shamita survives by landing on a parapet. Nisha confesses her crime and asks for forgiveness. The narrator, Sudha Chandran, warns the viewers about the dangers of crossing the limits of friendship and respecting others' lives.
Here are the key facts extracted from the text:
1. The text is a transcript of an episode of Crime Alert, a show that deals with real-life crimes.
2. The episode is about Nisha, a woman who is obsessed with her friend and neighbor Shamita, and tries to harm Chandni, another neighbor who befriends Shamita.
3. Nisha slaps Chandni at Shamita's anniversary party, throws garbage and flower pots at her house, and finally pushes Shamita from the terrace in a fit of jealousy.
4. Shamita survives the fall and Nisha confesses her crime to the police.
5. Sudha Chandran, the host of the show, narrates the episode and gives moral lessons about friendship and boundaries.