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Celebrate 12 years of Star Trek Online with Season Twenty-five: Shadow's Advance, now live on PC!


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Preceeded by
Iconian War
Followed by
Future Proof
Episode Arc - Iconian War.png Episode Arc - Future Proof.png

Faction Na'kuhl.png Join the fight against rogue time travelers in a struggle to protect and preserve the galactic timeline.


The Yesterday's War story arc is a chain of cross-faction missions available to all factions.

The Iconian War has ended, but a rise in usage of temporal technology during the war will have everlasting repercussions. You have been summoned by the designated Temporal Officer to join Agent Daniels in maintaining what has been recorded as proper timeline.

But many are rising up to fight the "true timeline" the Alliance is enforcing. An unknown individual, only known as Envoy, is uniting them under the banner of Temporal Liberation Front. Captains will have to fight across multiple centuries and universes to prevent the temporal anomalies and incursions caused by the TLF.

List of missions[]

EP - Temporal Ambassador.png “Temporal Ambassador”

A strange anomaly has been detected in the Azure Nebula. With all of the Tholian activity in that area, can danger be too far behind?
Contact: Geordi La Forge / Tum'Era
Release Date: January 31, 2013
EP - Temporal Ambassador.png
“Temporal Ambassador”

A strange anomaly has been detected in the Azure Nebula. With all of the Tholian activity in that area, can danger be too far behind?
Contact:
Geordi La Forge / Tum'Era
Release Date:
January 31, 2013
Special rewards:

Special Requisition Pack - Support Cruiser (Ambassador) icon.png [Special Requisition Pack - Support Cruiser] (Faction FED-Allies.png)
Special Requisition Pack - Kamarag Battle Cruiser icon.png [Special Requisition Pack - Kamarag Battle Cruiser] (Faction KDF-Allies.png)
Yesterday's Enterprise Uniform icon.png [Yesterday's Enterprise Uniform]

Accolades:

Breen Invasion Arc icon.png Yesterday's War 1/6 (10 pt)
Alternate Allies icon.png Alternate Allies (10 pt)
Temporal Treasure Hunting icon.png Temporal Treasure Hunting (10 pt)
Dead Jim icon.png Dead Jim (10 pt)
Everyone Remember Where We Parked icon.png Everyone Remember Where We Parked (10 pt)
Don't Quit Your Day Job icon.png Don't Quit Your Day Job (10 pt)
Now You C Me icon.png Now You C Me (10 pt)

EP - The Once and Future Agent.png “The Once and Future Agent” Faction SFKERR.png (Non-DSC & TOS Starfleet)

Meet with Temporal Agent Daniels to discuss how you can help secure the galactic timeline.

Mission cannot be replayed.

Contact: Philip Crey / Q'on / Kail
Release Date: July 6, 2016
EP - The Once and Future Agent.png
“The Once and Future Agent” Faction SFKERR.png (Non-DSC & TOS Starfleet)

Meet with Temporal Agent Daniels to discuss how you can help secure the galactic timeline.

Mission cannot be replayed.

Contact:
Philip Crey / Q'on / Kail
Release Date:
July 6, 2016
Special rewards:

There are no rewards specific to this mission.

Accolades:

Breen Invasion Arc icon.png Yesterday's War 1/6 (10 pt)

EP - Core of the Matter.png “The Core of the Matter”

Daniels has discovered unusual temporal activity in 23rd Century Romulan space and requires your assistance.
Contact: Daniels
Release Date: July 6, 2016
EP - Core of the Matter.png
“The Core of the Matter”

Daniels has discovered unusual temporal activity in 23rd Century Romulan space and requires your assistance.
Contact:
Daniels
Release Date:
July 6, 2016
Special rewards:

Neutronium-Laced Combat Armor icon.png [Neutronium-Laced Combat Armor]
Disruptor Pistol (Wide) icon.png [Disruptor Pistol (Wide) [CrtD] [Dmg]x2]
Disruptor Pistol (Wide) icon.png [Disruptor Pistol (Wide) [CrtD] [CrtH]x2]
Disruptor Pistol (Stun) icon.png [Disruptor Pistol (Stun) [CrtD] [Dmg]x2]
Disruptor Pistol (Stun) icon.png [Disruptor Pistol (Stun) [CrtD] [CrtH]x2]

Accolades:

Breen Invasion Arc icon.png Yesterday's War 1/6 (10 pt)

EP - Vorgon Conclusions.png “Vorgon Conclusions”

Time-travelling Vorgon agents may be threatening Kal Dano in the future. Travel to the Lirss System to investigate.
Contact: Daniels
Release Date: July 6, 2016
EP - Vorgon Conclusions.png
“Vorgon Conclusions”

Time-travelling Vorgon agents may be threatening Kal Dano in the future. Travel to the Lirss System to investigate.
Contact:
Daniels
Release Date:
July 6, 2016
Special rewards:

Dielectric Oscillation Personal Shield icon.png [Dielectric Oscillation Personal Shield]
Vorgon Tetryon Discharge Prism icon.png [Vorgon Tetryon Discharge Prism]

Accolades:

Breen Invasion Arc icon.png Yesterday's War 1/6 (10 pt)
Newsie icon.png Newsie (10 pt)
Newsie icon.png Belongs in a Museum (25 pt)

EP - Terminal Expanse.png “Terminal Expanse”

The Sphere Builders are conducting operations in a quantum universe similar to our own. They must be stopped!
Contact: Daniels
Release Date: July 6, 2016
EP - Terminal Expanse.png
“Terminal Expanse”

The Sphere Builders are conducting operations in a quantum universe similar to our own. They must be stopped!
Contact:
Daniels
Release Date:
July 6, 2016
Special rewards:

Kelvin Timeline Bat'leth icon.png [Kelvin Timeline Bat'leth [CrtD] [CrtH] [Dmg]]

Accolades:

Breen Invasion Arc icon.png Yesterday's War 1/6 (10 pt)

EP-Survivor.png “Survivor”

Starfleet admiral T'nae was duplicated during a temporal incident. Until this has been resolved, the galactic timeline is in jeopardy. Work with Agent Daniels to make things right!
Contact: Daniels
Release Date: April 6, 2017
EP-Survivor.png
“Survivor”

Starfleet admiral T'nae was duplicated during a temporal incident. Until this has been resolved, the galactic timeline is in jeopardy. Work with Agent Daniels to make things right!
Contact:
Daniels
Release Date:
April 6, 2017
Special rewards:

Romulan Operative Combat Armor icon.png [Romulan Operative Combat Armor]
Romulan Operative Personal Shield icon.png [Romulan Operative Personal Shield]
Polaron Covert-Ops Compression Pistol icon.png [Polaron Covert-Ops Compression Pistol [CrtD] [CrtH] [Dmg]]

Accolades:

Breen Invasion Arc icon.png Yesterday's War 1/6 (10 pt)

Notes[]

See also[]

v · d · e
Storyline Missions      
All Starfleet Factions Starfleet-only
Tutorial DSC Starfleet only “Graduation Day”“Routine Maneuvers”“Trial by Fire”“The Shadow Knows”“Children of War”“Reporting In”
TOS Starfleet only “I Sing of Arms”“Search and Rescue”“Bull by the Horns”“Dislodging Klingons”“The Taurean Affair”“Earthward Bound”
25th century Starfleet only “Graduation Day”“Training Cruise”“Field Promotions”“Communication Breakdown”“Assimilation of the Innocent”
Agents of Yesterday TOS Starfleet only “Explore Earth Spacedock”“In the Shadow of Cestus”“Painful Omens”“Return to Babel”“Tangled Webs”“The Battle of Caleb IV”
Klingon War “Welcome to Earth Spacedock”“Diplomatic Orders”“Stranded In Space”“Researcher Rescue”“Secret Orders”“The Doomsday Device”“The Galaxy at Large”
Romulan Mystery “Heading Out”“Empress Sela”“Desperate Measures”“Shadow Play”“Taris”
Faction KDF.png Klingon Defense Force-only
Tutorial “End of Watch”“Red Alert!”“Intruder Alert”“Challenge for Command”“Your New Command”“Journey to Qo'noS”
Empire “Duties of Command”“The Hunt is On”“Space Chase”“Manhunt”“Friend or Foe”
Warzone “Bringing Down the House”“The House Always Wins”
Vigilance “Mars, the Bringer of War”“Alpha”
Fek'Ihri Return “Blood of the Empire”“Destiny”“Afterlife”
Faction Romulan Republic.png Romulan Republic-only
Tutorial “A Day on the Farm”“A Day in the Sun”“Virinat, Invaded”“Flight from Virinat”
From the Ashes “Explore the Flotilla”“The Helix”“Crossroads at Crateris”“Gasko Blues”“The Search for New Romulus”“Turning Point”“Neutral No More”
Allies “The Price of Neutrality”“Memory Lane”“Bigger Picture”“Smash and Grab”“Tradecraft”
In Shadows “An Inside Job”“Enemy Action”“Sleepers”“Cloak and Dagger”“Revelation”“Mind Game”
Wasteland “Secrets of Nimbus”“The Lost City of Paradise”“Blind Men Tell All Tales”“The Undying”“A Fistful of Gorn”“Installation 18”
Vengeance “Voice of the Voiceless”“Abducted”“Small Packages”“Last Stand”“The Best Defense”“Turnabout”“Devil's Choice”
Freedom “Toward Freedom”
Faction Dominion.png Dominion-only
Engineered for War “Hunt”“Ceremony”“Turn the Tide”
Faction Khitomer.png Cross-faction
Cloaked Intentions “The Vault”“Mine Enemy”“Frozen”“Coliseum”“Cutting the Cord”“Darkness Before the Dawn”
Cardassian Struggle “Lost and Found”“Spoils of War”“Jabberwocky”“The Factory”“The New Link”
Borg Advance “Task Force Operations”“Report on Borg Activities”“Where Angels Fear to Tread”“A Gathering Darkness”“Assimilation”“Fluid Dynamics”
New Romulus “New Romulus Aid”“Staging Area”“Hidden Camera”“Warehouse”“Mountain Base”“Secret Shuttle Codes”“Overgrown Caves”“Web Access”“Latest Findings”“The Power Source”“Secrets of the Ancients”
Solanae Dyson Sphere “Sphere of Influence”“Circles within Circles”“Supply Woes”“The Contested Zone”“The Omega Standoff”“Tower Control”“A Step Between Stars”“Fluidic Destruction”“Surface Tension”
Delta Quadrant “Escalation”“Mindscape”“Reunion”“Friends in Unlikely Places”“Revelations”“Enemies in All the Usual Places”“All That Glitters”“The Kobali Front”“Capture the Flag”“The Dragon's Deceit”“Alliances”“Know Your Enemies”“Revolution”“Taking Care of Enemies”“Takedown”“What's Left Behind”“Dust to Dust”
Iconian War “Uneasy Allies”“Blood of Ancients”“Delta Flight”“House Pegh”“Time in a Bottle”“Broken Circle”“Butterfly”“Midnight”
Yesterday's War “Temporal Ambassador”“The Once and Future Agent”“The Core of the Matter”“Vorgon Conclusions”“Terminal Expanse”“Survivor”
Future Proof “Sunrise”“Stormbound”“Time and Tide”“The Temporal Front”“Temporal Reckoning”“Ragnarok”
New Frontiers “Echoes of Light”“Of Signs and Portents”“Mirrors and Smoke”“Brushfire”“Beyond the Nexus”“Melting Pot”“Scylla and Charybdis”“The Renegade's Regret”
Gamma Quadrant “Storm Clouds Gather”“Armistice”“The Search”“Doomed to Repeat”“Quark's Lucky Seven”“Tenebris Torquent”“Home”
Age of Discovery “The Plausibility of the Possible”“Impossibility of Reason”“Secrets”“Downfall”
J'Ula's Discovery “Para Pacem”“Illusion of Communication”“Beneath the Skin”“Sentinels”“Rescue and Search”“Within The Briars”“The Ninth Rule”“Ruins of Doom”“The Measure of Morality (Part 1)”“The Measure of Morality (Part 2)”
Klingon Civil War “The Centre Cannot Hold”“The Khitomer Discord”“Partisans”“Knowledge is Power”“Leap of Faith”“Warriors of the Empire”“A Day Long Remembered”
Terran Gambit “Firewall”
Some missions may appear in alternative orders for some factions.
Mission available Side Content: The Galaxy at Large
Spectres “Spectres”“Skirmish”“Spin the Wheel”“What Lies Beneath”“Everything Old is New”“Night of the Comet”
Wasteland “Secrets of Nimbus”“The Lost City of Paradise”“Blind Men Tell All Tales”“The Undying”“A Fistful of Gorn”“Installation 18”
(Still part of main episode progression for Romulan Republic players.)
Lost Dominion: The 2800 “Lost Dominion”“Second Wave”“Of Bajor”“Operation Gamma”“Facility 4028”“Boldly They Rode”
Cold War “Cold War (wrapper)”“Cold Call”“Out in the Cold”“Cold Comfort”“Cold Case”“Cold Storage”
Delta Quadrant “Kobali Crisis Act I”“Kobali Crisis Act II”“Kobali Crisis Act III”
See also: Featured episodePatrolRemoved MissionsTask Force Operation
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