For the doors, use the assistant’s terminal and reset the password to use on the door terminal. The two tricky parts are opening the doors and getting the power back on. It is pretty straight forward, get to the objective and kill Synths. When you are ready, talk to Danse and he will lead you to the factory. You will be doing to a factory and be facing off with Synths so any robot damages weapons are a plus. Go into the police station and loot anything you want before you go. After you beat them, talk to the Paladin and he will give you the next part of the quest. When you get there you will have to fight off a few waves of ghouls with a Paladin. Listen to the radio station and then go to the Police station. AS you get close you will get a radio transmission and a quest will pop up called Call To Arms. This is where you can find the quest to start up with the Brotherhood Of Steel. I would recommend atleast being level 10 if you aren’t using you Power Armor to start this quest up. Check out this article to find out How To Join The Brotherhood Of Steel In Fallout 4! How To Join The Brotherhood Of Steel In Fallout 4 This is not something you have to do so it can be easily missed if you aren’t looking in the right spot. The Brotherhood Of Steel makes its return in Fallout 4 and you can join up with them. How To Join The Brotherhood Of Steel In Fallout 4