Star Trek: The Next Generation (1987)

S03E10 The Defector

Stardate: 43462.5. A Romulan defector approaches the Federation with critical information regarding an imminent assault. The defector reveals that the Romulans are covertly setting up military installations within the Neutral Zone, posing a significant threat to Federation security. As tensions rise, the crew must navigate the complexities of this intelligence while preparing for a potential confrontation with the Romulan Empire.