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Faction Khitomer.png Cold Storage
Preserver Obelisk.jpg
Given by:
Preceded by:
“Cold Case”
Story Arc:
Cold War
September 25, 2010
Lv 49: 2580 Experience Point icon.png
Lv 50: 2976 Experience Point icon.png
Lv 49: 2475 Expertise icon.png
Lv 50: 2598 Expertise icon.png
Plus one of the following:

In Cold Storage the player discovers the Preserver Archive and defeats Thot Trel.


In the Lae'nas System the Breen try to take the third planet from the Alpha Jem'Hadar. Several skirmishes in orbit of Lae'nas III are taking place when the player enters the system. After eliminating enemy presence in orbit of the planet, the player beams down to search for the archive.

On the surface, several Preserver relics can be found, which ultimately guide the player to an intact Preserver Obelisk, marking the entrance to the underground archive. However, the Breen are already all over the planet as well as inside the archive and are offering heavy resistance to the away team.

Inside the underground caverns, the player has to defeat the invaders and must solve an ancient puzzle based on sound in order to get access to the archive. The archive itself is in fact a cryogenic storage, where many Preservers are hibernating. The Preserver Guardian explains that there are enough Preservers in this underground realm to repopulate and maintain their species. They are looking forward to see what the child races have achieved in their absence.

The advanced technology that the Breen and the player are looking for is revealed to be the genetic codes of all humanoid species in the Milky Way, which the guardian is willing to share freely. In the archive there is nothing of interest to the Breen, especially not the weapons Trel is seeking. Enraged by this revelation, Thot Trel is determined to destroy the whole facility. The player has to fight him and his troops to secure the archive.

In the aftermath of the battle, the Deferi are entering the system and beaming down to the planet with a science team to begin studying the archive.


Mission Text[]

Our scientists have consulted with your commanders and they concur with your crew's theory.

If there is an intact Preserver library, it is likely to be located in the Lae'nas system. I suggest that you begin your search on Lae'nas III. It has a climate very similar to Defera. If the Preservers settled here eons ago, it is possible that they would have chosen a similar world for this facility.

Please, be safe, but be quick. Long range sensors have detected Breen vessels in the space near the Lae'nas system. I fear that they have made the same conclusions we have. You must find the Preserver technology before they do!


Go to the Lae'nas system, which is in the Raveh Sector of the Alpha Quadrant, and continue the search for Preserver technology.


The obelisk on Lae'nas III is the entrance to the underground Preserver Archive.

  • Scavenger Hunt
    • Go To Lae'nas System
    • Defeat Hostile Squadrons (0/3)
    • Beam Down to Lae'nas III
  • Enter the Archive
    • Go To Lae'nas III
    • Investigate Buried Object
    • Locate the Source of Power Fluctuations
    • Find Neutrino Emitter
    • Temporal objective.png Investigate Temporal Probe (Temporal Agent)
    • Locate the Preserver Archive
    • Scan the Obelisk
    • Secure the Obelisk (0/2)
    • Examine Scan Results
    • Enter the Archive
  • To Protect and Preserve
    • Go To Lae'nas III - Obelisk Complex
    • Defeat Breen Invaders (0/4)
    • Use Consoles to Access the Archive
    • Defend the Access Consoles
    • Activate the Archive
    • Talk to the Preserver Archivist
    • Listen to Breen Captain
    • Protect the Archive
    • Talk to Deferi Science Team
    • Delta objective.png Speak with Temporal Agent Crey (Delta Recruits)
    • Depart System
  • Report to Ambassador Surah




  • Critter Rank 3 icon.png Preserver Guardian


NPC starships[]


  • none


Alpha Jem'Hadar[]

Breen Confederacy[]


There are no accolades specific to this mission.


There is no walkthrough for this mission, yet. You can help STOWiki by writing it here.

Mission Replay[]

This mission is repeatable through Mission Replay, although the Rewards for completing might be reduced. Items scale to a player appropriate level (Scaling Rewards), as followed:

Level Rank SP Exp Mark <>
48–49 Faction FED25.png Rear Admiral UH
Faction KDF.png Major General
Faction Romulan Republic.png Subadmiral II
1935 1856 X
50 Faction Romulan Republic.png Vice Admiral 2232 1949 XI

Feature Episode Notes[]

  • Fifth of five missions of the first Feature Episode The Breen released in fall 2010. Later retitled Cold War, the missions are currently available for all factions, forming the Breen Invasion storyline episode.
  • The mission is part of the Feature Episode re-runs, and as such eligible for limited time, special mission rewards.
    • The reward for completing the first Featured Episode Series before 3am PDT on October 14th was a [Breen Tactical Officer Candidate].
    • For the first Feature Episode Rerun week (May 5–11, 2011) new mission rewards were added to this episode, including making the rewards previously only available through mission replay available for selection on the first run, adding the [Dialectric Oscillation Resilient Shields] (a permanent addition to the mission rewards) and adding the choice of level-appropriate badges for the duration of the Rerun week. The special [Breen Tactical Officer Candidate] reward was available during the Replay week as well.
    • During the fourth Feature Episode re-run (October 31 to December 5, 2013) the mission was eligible for the daily Lobi Crystal reward (once 15 Lobi Crystal icon.png per player account and day). Also the [Breen Tactical Officer Candidate] was again available as reward.


  • For the "Defeat Hostile Squadrons" objective, there are three groups of hostiles near the planet to defeat.
  • Activate the consoles in the following order: East, West, Center (Low Tone, Mid Tone, High Tone).
  • For the "Defend the Access Consoles" objective, there are three waves of Breen to fight off.
  • During the end battle if you are an engineer class you can erect a cover shield on the walkway while Thot Trel is speaking with the preserver. This will block him from moving/attacking and allow you to take care of the other Breen forces.
  • The console used to Delta objective.png Activate the Archive, is actually part of the mission's Delta Objective.
  • Players participating in the Delta Recruitment Event will see their factions' temporal investigations contact appear along with the Deferi research team once Thot Trel is defeated. Speaking with this contact will begin a cutscene that brings the events of the Delta Recruit story full-circle and provides two final rewards. However, with the 2021 update of the event, the Delta Recruitment conclusion has been changed from this mission to “Butterfly”.
  • The obelisk seen in this mission is somewhat similar to the obelisk seen in the TOS episode "The Paradise Syndrome". The entry point into the underground part is the same, and the general shape is as well. In addition, the obelisk could be generating the force field seen in the sky, just like the episode. However, the underground interior is different. It is possible that the obelisk in the episode was created by the Preservers as well.
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All Starfleet Factions Starfleet-only
Faction KDF.png Klingon Defense Force-only
Faction Romulan Republic.png Romulan Republic-only
Faction Dominion.png Dominion-only
Faction Khitomer.png Cross-faction
Mission available Side Content: The Galaxy at Large
See also: Featured episodePatrolRemoved MissionsTask Force Operation