It Came from Beneath the Sea

A Harvard University marine biologist who helps identify the giant octopus from tissue samples. He approaches the threat with scientific rigor and a willingness to seek evidence, even when officials doubt him. He collaborates with Joyce and Mathews on both sea and shore operations, contributing his expertise to the hunt and rescue efforts.

Navy submarine commander who leads the shakedown and the chase of the monster. He remains decisive under pressure, coordinating with scientists and officials to implement countermeasures and evacuations. His leadership and growing partnership with Joyce push the mission toward its climactic strike.

Marine biologist who teams with Carter to analyze octopus tissue and bring the crisis to light. She argues for action to protect the public and demonstrates innovative methods, including weapons concepts, to reporters. Joyce's relationship with Mathews evolves amid the danger, underscoring a personal stake in the mission’s outcome.

A senior Navy official who embodies cautious, military judgment. He weighs the science against strategic needs and finally supports drastic measures as evidence mounts. His decisions shape the response from the command center to the sea front.

The local sheriff who aids Mathews and Joyce on the Oregon coast and helps coordinate investigations. He encounters the giant creature during an attack on a beach, underscoring the civilian danger and the need for rapid mobilization. Nash's practical perspective keeps the civilian angle in focus.

A loyal naval officer who backs Mathews during operations and contributes to the pursuit of the giant octopus. He provides procedural support and realism to the mission's military side.

An admiral who advises on strategic deployment and supports top-level decisions during the crisis. He collaborates with Burns and other officials to execute the plan to mine waters and launch countermeasures.

A naval captain coordinating maritime assets in the response to the threat. He works with Mathews's team to manage movements and protect critical coastal infrastructure during the monster's assault.