Agents of Yesterday

Agents of Yesterday, launched 6 July 2016, is the third expansion for Star Trek Online, focused on the 23rd century.

TOS Faction

 * See main article: TOS Faction

A new faction, featuring Starfleet characters and stories set during the 23rd century, beginning in 2270. Similar to the Romulan Republic, TOS characters will join the other factions for shared endgame content, following the Agents of Yesterday tutorial arc. 23rd century missions will take place in a separated instance of sector space, and feature a 23rd century version of Earth Spacedock as a faction hub. Playable characters available to TOS faction are Andorian, Human, Tellarite and Vulcan.

Missions
Agents of Yesterday will be set shortly after the timeline of the , featuring locations, characters and starships from that time period.

Missions unique to the TOS faction include the Agents of Yesterday story arc:

New faction-agnostic missions include the Yesterday's War story arc:

Two new faction-agnostic missions were also added to the Future Proof story arc:

Temporal Operative Specialization
Temporal Operative, a primary specialization that also introduces new Bridge officer abilities. Bridge Officer abilities introduce a new game feature called Entropy, which is either applied or used when Temporal abilities are used on enemies.

Temporal Defense Initiative Reputation
A new Reputation for all factions. The reputation includes two new space queues, and, and one new ground queue,. Temporal Marks will also be available from the Badlands Battlezone.

Temporal Agent Recruitment
An event, similar to the Delta Recruitment, in which new TOS characters will be able to earn special rewards. All characters created during the first six weeks following the expansion's launch are eligible to participate in the Temporal Agent Recruitment event.

Confirmed voice actors and characters
The expansion features the voice talents of Walter Koenig, Christopher Doohan, Matt Winston, Vic Mignogna, Joseph Gatt, and Chase Masterson. Spock also makes an appearance in the expansion, albeit with re-purposed lines from Leonard Nimoy's opening and sector block narrations.

Additional TOS characters
Other characters from The Original Series appear without voice-acting and some have dialogue snippets from the Original Series, including Enterprise crew members Nyota Uhura, Hikaru Sulu, Mears, Leslie, Palmer and Hadley, as well as diplomats Sarek and Gav. James T. Kirk appears briefly in, albeit without dialog.

Kelvin Timeline
Joseph Gatt portrays 0718, an augmented science officer from the U.S.S. Enterprise of the Kelvin Timeline, as depicted in. Lieutenant 0718 appears alongside other elements from that universe, including the re-imagined Constitution class and the Klingon D4 class. This is the first appearance of elements from the rebooted Star Trek movies in-game since the Red Matter Capacitor, which was available as a bonus item for special release editions of Star Trek Online in 2009.

Ships
Agents of Yesterday features many new vessels, including Temporal vessels and era-appropriate, 23rd century ships. The original Constitution class model has been rebuilt from scratch to fit the original studio model more closely.

Several TOS-era vessels will receive T6 counterparts, which will be able to use the TOS-era skin. Three new T6 vessels are available for Klingon and Romulan players, while the majority are available to Federation and TOS characters only.

Registry Numbers
The newly released starships will be allowed to use era-appropriate registry numbers (i.e., four-digit numbers for the Constitution, three-digit numbers for Daedalus class ships, and two-digit numbers for NX class ships).

List of Ships

 * 31st Century Temporal Ship Bundle
 * Chronos-class Temporal Dreadnought Cruiser (T6)
 * Eternal-class Temporal Multi-Mission Science Vessel (T6)
 * Ouroboros-class Temporal Raider (T6)
 * Temporal Special Agent Pack
 * Constitution-class Light Cruiser (T1)
 * Daedalus-class Temporal Science Vessel (T2)
 * Perseus-class Temporal Escort (T3)
 * Gemini-class Temporal Cruiser (T4)
 * Ranger-class Temporal Battlecruiser (T5)
 * Nautilus-class Temporal Science Vessel (T6)
 * Fleet Nautilus-class Temporal Science Vessel (T6)
 * Paladin-class Temporal Battlecruiser (T6)
 * Fleet Paladin-class Temporal Battlecruiser (T6)
 * Sagittarius-class Temporal Cruiser (T6)
 * Fleet Sagittarius-class Temporal Cruiser (T6)
 * Theseus-class Temporal Escort (T6)
 * Fleet Theseus-class Temporal Escort (T6)
 * Tutorial Starship
 * Pioneer-class Utility Cruiser (T1)

Agents of Yesterday: Artifacts
Agents of Yesterday: Artifacts was a mid-expansion update, released on October 25, 2016. It featured a new episode,, introducing the New Frontiers, a story arc involving the Lukari.

Update included a new fleet holding (Fleet Station K-13), a revamp of the Kit system and updated lighting and graphics, as well as an introduction of a Sphere Builder Lock Box. In addition, New Romulus ground missions (including the New Romulus Reputation System missions) and Kobali Prime Adventure Zone missions were added to the mission journal.

Systems

 * Changes to Kit system
 * Kit modules now equipped directly, rather than inside frames
 * Kits and kit modules can now be upgraded
 * Kit frames now only give innate buffs. (such as +max hit points, +kit mod performance)
 * New Fleet Holding
 * Fleet Holding: Fleet Station K-13 (Tier 1–3)
 * 23rd Century Uniforms
 * 23rd Century Duty Officers
 * 23rd Century Bridge Officer Candidates
 * Trait Enhancements
 * Fleet 23rd Century Ground Weapons
 * Fleet 23rd Century Space Weapons
 * 23rd Century Training Manuals
 * 23rd Century Kit Modules Mk XII
 * Xenotech Engineering Consoles Mk XII
 * Updated graphics and lighting

Locations and missions

 * Feature Episodes

Items

 * New

Ships

 * Lobi Crystal Consortium
 * Sphere Builder Edoulg-class Science Vessel (T6)
 * Sphere Builder Lock Box
 * Sphere Builder Arehbes-class Destroyer (T5)
 * Sphere Builder Denuos-class Dreadnought Carrier (T6)

Giveaway
From October 27th to 29th, 2016, players could claim three free items from the Zen Store, once per account:
 * 1 Large XP Boost
 * 3 Duty Officer Packs
 * 1 R&D Box

Release History
Agents of Yesterday was released on July 6, 2016. Similar to previous expansions, item packs are available for purchase, which contain several Zen Store ships, uniforms and other perks like titles and upgrade kits.

Beta Testing for the expansion began in early May, with test builds being released on the Tribble test server. Since then, several updates have been released and new missions and systems were gradually released for testing.