First of all, good job getting this together! It's obvious you put your time and dedication to make this animation. I'd like to say congratulations for not giving up and leave the project like a lot of people do out there!
Graphics are superb. I feel I have to mention your incredible lighting, which adds so much to the atmosphere and feeling in overall. In your animation you've captured realistic and believable motions (which is probably one of the most important aspects when working with stick figures). The thing I see is bad with the the graphics/animation is the sometimes extreme similarities from the Castle series (like when opening the briefing-folder shot), and the eyes(exact shading like I do). At the same time however, I can see your own personal style shining through and I like it a lot - keep on developing that my friend. :-)
Audio. First off you've got amazing voiceactors! You also did a good job distorting the voices to fit the scene, like when they were talking through radio or when that thing was listening in the ventilation duct. I seem to miss a background soundtrack at some scenes however. Even just a sound of the wind or a sound scape would really lift the atmosphere of your work, please do that next time! :D
Keep it up man. Thanks for listing me under thanks to!