Star Trek: The Delta Omicron Incident

The Federation Constitution-class starship USS Enterprise NCC-1701 visited the planet Delta Omicron III. Captain James T. Kirk beamed down to the planet and was captured by Romulan agents. Mister Spock devised a plan to rescue Captain Kirk. He put that plan into effect and Kirk was freed. 1 Federation security officer and 10 Romulans were killed in the rescue. Kirk and Spock beamed back to the Enterprise. The USS Enterprise then left the Delta Omicron star system.