There are 5 missions in the Breen Invasion story arc. If you are stuck, click a mission title for a walkthrough courtesy of www.stoacademy.com.
1.
Cold Call2.
Out in the Cold3.
Cold Confort4.
Cold Case*** Spoiler - click to reveal ***It can be difficult to figure out which panel number goes with which panel. If you're facing the stairs from the center pad like the walkthrough says, then here is the panel number layout:
____|....|_<--- stairs
[01] [04] [06]
[02] (....) [07]
[03] [05] [08]
You need to activate panels 04, 07 and 03 to proceed.
5.
Cold StorageMoldy Tacos5000 says:
As it has been removed from the story mission lineup, it is still possible to complete this, however you need to get the origination quests from J'mpok and Quinn at level 65. Unfortunately this is only available to Starfleet and Klingon characters, not Federation-aligned Romulans and Jem'Hadar.
Nomstuff says:
It apparently is available to all Factions but with a caveat for console that you need to play it with someone who has already done it