On this page of our guide to Wolfenstein: Youngblood you will find a detailed description of Infiltrator's Report side mission. This task involves breaking into a prison in the Brother 1 district with the intention of liberating a group of prisoners.
Who's commissioning the mission: Talk to Maria Laurent in a hiding place in the catacombs.
This task takes place in Brother 1 district where you could have unlocked a fast travel point (subway) - see separate pages of our guide for more information. When you reach this district, set the mission as active and follow the instructions on the mini-map.
You have to break into the prison. If you have used the shortcut before, then after you reach the Gestapo building from the above picture you can choose any side staircase and immediately get inside. Otherwise you have to choose a roundabout way to prison.
Regardless of the chosen route, you will reach the prison elevator. Your task is to open the Wing C. You can eliminate Nazis you meet or try to sneak past them. The sisters must reach the room with the two levers and pull them in the same time.
After the prisoners have been released, they still have to escape from prison. Go back to the elevator, but expect reinforcements to arrive. They will certainly include Laser Supersoldats and the first of them can be encountered just when you leave the room with levers. Depending on the situation, use weapons for short or long distance combat and, of course, those that can destroy the "horizontal" shields.
After escaping from prison, return to the Catacombs and talk to Maria to complete the mission.
Rewards: 9100 XP, 455 silver coins, 1 skill point.