ENT Season 4 Episode 12 Babel One

Plot

It is November 2154, and Captain Archer and Ensign Sato spend time preparing for the arrival of Ambassador Gral and the Tellarite delegation, by practicing being blunt, complaining, and arguing. En route to the trade summit on "Babel One", they detect a distress call from the Andorian warship, Kumari, now under attack. Enterprise alters its course to assist, and arrives to find Commander Shran, Lieutenant Talas, and 17 other survivors in escape-pods. Archer goes to meet him in Sickbay, and an angry Shran claims that both the Andorian Ambassador's and his ship were attacked and destroyed by a powerful Tellarite vessel.
Scans of the debris indicate Tellarite weapon signatures, and recovered sensor data shows a Tellarite vessel firing. With both delegations on board, and accusations of duplicity rising between the groups, Archer considers taking the Andorians to their homeworld. At full warp, Enterprise is suddenly attacked by an Andorian ship. When attempts at communicating fail, Archer demands that Shran intervene — he complies by explaining how to knock out its shields — but the attempt is ineffective. Enterprise is spared only when the attacking ship has to retreat because of a fluctuating power grid. T'Pol then notices that the "Andorian" and "Tellarite" ships have the same energy signature. The alien vessel is then tracked, and it appears to be capable of holographically disguising itself. Shran is unconvinced, and using Talas as a distraction, manages to escape and capture Gral, before order is restored. However, when Archer convinces Shran to examine the evidence, a member of the Tellarite delegation is able to wrest a weapon from Talas, and shoots her.
Meanwhile, Commander Tucker, Lieutenant Malcolm Reed and two MACOs beam aboard the ship, only to find it deserted and without life support. Although the MACOs are beamed back, the transporter is damaged before Tucker and Reed can be rescued. They are able to locate an oxygen supply within the ship's systems, but become stranded when the vessel warps away, and make their way to an empty bridge. On Romulus, it is revealed that the ship is actually a drone, controlled by a pilot under the command of Romulan Admiral Valdore, supported by a scientist called Nijil, in an attempt to prevent a regional détente.