Alright, so I got the runaround workaround to work, but now I can't get the mission to complete. Everything on the map is dead, all prisoners are freed. There's an interactive console here for the cloaking device thing, and the only other interactive thing on the whole map is the shuttle cutscene.

There doesn't appear to be any way to complete this mission.

1) Obtain mission
2) Set your crew to "Passive" mode
- Note here you only have 2 tasks to complete on the misison.
3) Sprint up the hill to the 1st base, running past the guards till the top of the hill, right before the 1st base.
- Note here you should see several other tasks appear including the dreaded "Disrupt Tal Shiar Operations and Subdue Tal Shiar agents"
4) Turn off passive mode.
4) Go kill every thing in sight, hit the consoles, free the captives.
5) Once you make it to the top you'll get an exit option.

I've tried this on a couple different toons and it worked fine.

Confirmed. It works.
And thats ridiculous...

Mission Incomplete.

After running this mission about 7 times without success, and reading through all the so-called "fixes", I've found a reliable way to get this mission to complete every time.

The problem is this: When you start the mission you only have two objectives. As you're making your way up the pass you have a Romulan group that runs down towards you. If you attack this group BEFORE you get an updated list of objectives, the "Subdue Tal'Shiar agents" objective will not complete.
The reason this happens is that whoever designed this mission put the trigger to update your objectives at about the same point that you'd encounter that first group. Since most players kill first and then move on, it's possible to screw this step up every time if you don't understand how triggers and such works.

The key to finishing this mission is to continue moving up towards the base until you see your objectives update. THEN kill that first group.

Got it to work.

As previously stated:

Run by first group and into the first camp.

Most likely die.

Respawn and fight.

Once you get to the top the mission completes and you are offered an exit.

After it wouldn't complete twice... I finally found this thread. I killed all of the enemies all the way up the mountain (which gave me the Tal Shiar Agents piece) and then came back and worked on everything else.

Did you ever get a reply to this question? I can't drop the mission?

This mission is still bugged at the steps mentioned above. Game breaking, hope it gets fixed soon.

Does anyone else have this problem? I can't drop the mission to replay it, nor can I enter the instance again.