Leviathan Explained: The Hidden Threat of Season 1

Leviathan is the hidden organization behind much of Season 1's conflict. This article stays spoiler-light and focuses on what the group is, how it operates, and why it matters to the story.

What is Leviathan?

Leviathan is a secretive organization with ties to the Soviet world. It operates in the shadows, using spies, specialists, and stolen technology to pursue its goals. In the series, its interest in Howard Stark's inventions drives much of the plot.

Why it matters to the plot

When Howard's weapons and prototypes go missing, the SSR assumes he is the traitor. Peggy suspects there is a larger operation at work, and that suspicion sets up the central mystery of the season. Leviathan is the answer, but Peggy has to dig for it while avoiding the colleagues who are hunting her friend.

Operatives to watch for

• Dottie Underwood: a skilled agent with a dangerous past. See our Dottie profile.
• Dr. Johann Fennhoff: a persuasive specialist who uses charm and psychology as weapons.
• Vasily Karpov: a commanding figure who connects the season's threats.

The Cold War feel

Leviathan gives the show a postwar atmosphere in which former allies are becoming rivals. The tension between East and West is in the background of many scenes, and it helps explain why technology like Howard's is so valuable.

How it differs from Hydra

Fans of the MCU may compare Leviathan to Hydra. Both are secret groups with dangerous ambitions, but Leviathan feels more like an espionage network than a cult of supremacy. It is a different kind of enemy, which suits the show's spy-thriller tone.

Where to go next

For the broader context, read our overview of the SSR, or visit the Season 1 episode list to rewatch with Leviathan in mind.