Ep 10. The Leviathan

In Elementary Season 1 Episode 10 titled "The Leviathan," Sherlock Holmes and Joan Watson investigate the murder of a mathematician who was working on a project for the National Security Agency (NSA). The team is called in by Detective Bell, who suspects that the mathematician's death may be related to his work for the NSA. As they begin their investigation, they discover that the mathematician was working on a complex encryption algorithm that the NSA wanted to use to protect their classified information.

As Sherlock and Joan delve deeper into the case, they start to unravel a web of deceit and betrayal that reaches all the way to the highest levels of the government. They learn that the mathematician was not the only person working on the encryption algorithm and that someone is willing to do whatever it takes to get their hands on it. With the help of their contacts within the NSA, Sherlock and Joan race against time to find the killer before they can steal the encryption algorithm and sell it to the highest bidder.

Along the way, the team meets a number of colorful characters, including a young hacker who may hold the key to solving the case and a Russian spy who has a past with Sherlock. As the investigation heats up, Sherlock must confront his own demons and come to terms with the fact that the consequences of his actions can have far-reaching effects.

As always, the episode is full of twists and turns, with a number of unexpected revelations and plot twists that will keep viewers on the edge of their seats. The relationship between Sherlock and Joan also continues to develop, with the two growing closer as they work together to solve the case. Overall, "The Leviathan" is an exciting and suspenseful episode that showcases the best of Elementary's unique blend of procedural and character-driven storytelling.