“The Enterprise Incident”
Written by D.C. Fontana
Directed by John Meredyth Lucas
Season 3, Episode 4
Production episode 60043-59
Original air date: September 27, 1968
Captain’s log. Kirk is acting irrationally, being snappish with both Chekov and Spock and then ordering the ship to head for the Romulan Neutral Zone, in violation of treaty, and entirely on his own authority, as no order from Starfleet has come in that Uhura is aware of. They go through the Zone and into Romulan space. Three ships decloak: Romulan ships, albeit of Klingon design. The Enterprise is surrounded.
Sub-commander Tal contacts them, asking them to surrender or be destroyed, giving them an hour to comply. Kirk and Spock theorize that they would’ve just destroyed them right off normally, but they must want the ship.