S1, E4: A CBI agent is sarcastically questioned about solving cases by watching TV, but then reveals they have an important lead for a worried individual. Dolly, who worked for Nandini for 7-8 years, privately tells the CBI that she believes Rishi sir killed Nandini, citing frequent fights between them. There's a flashback or conversation where Rishi is asked if he's satisfied with punishing them.