Open foil-wrapped brick and you will find explosives inside it. Place it on the metal door. Now use Ransome's Candy Dispenser on the explosive.
Walk through the door and go to the right. Use the red button on the wall. Keep going to the right until you reach the laser corridor. Put the aluminum on the pirate hat, then wear it and go right. You will be completely safe and the lasers won't harm you.
You will reach the room with a giant fan. Next to him you will find a badge with a number. Switch to Franklin, go to any room and use "zap" on the phone. Select the above number and you will deactivate the fan.
Walk through the stopped fan as Dolores. Switch back to Franklin and select the same number to activate the fan. Switch to the girl and go up the ladder so that the rest of the crew can join you.
Use Strange Tool as Agent Reyes on the slot next to the door. Walk inside as Dolores.
Keep pressing the tubes until only one remains. Time for a really surprising reveal. You will participate in a long dialogue with Chuck after which the chapter will end.