Underground Undercover | Fallout 4 Wiki

Underground Undercover is a Quest for Fallout 4. You receive a Holotape from Desdemona to use at a terminal at The Institute (Location) to contact Patriot, who is working with the Railroad, after completing The Molecular Level main quest and cooperating with The Railroad. To obtain the Network Scanner, speak with Tinker Tom.

 

I was hoping for more time to organize our rebellion, but it's clear we cannot delay. Once you secure the Railroad against the Brotherhood, tell your people we are ready to fight. Go now.

 

How to Unlock Underground Undercover Quest in Fallout 4

• Once the player character has finished the "Tradecraft" quest, the quest will be unlocked.

 

Fallout 4 Underground Undercover Quest Notes & Tips

Notes, Tips, and other helpful information for this quest are indicated in this section.

• Notes, Tips, and others go here.
• This quest has reported some bugs:
  • All Platforms:
  • On PC:

 

 

Fallout 4 Underground Undercover Quest Walkthrough

After working with  The Railroad during the main quest  The Molecular Level you are given a Holotape from  Desdemona to use at a terminal at  The Institute (Location) to contact  Patriot, who is working with the Railroad. Speak to  Tinker Tom to receive the  Network Scanner. Relay into the Institute, and access a terminal and insert the tape and read the message from Patriot.

Go to Advanced Systems into the maintenance room and speak to  Liam Binet, who will introduce you to the synth  Z1-14. Relay back to base and speak with  Desdemona.

Patriot needs the login for the C.I.T. security sytem named Code Defender.  Desdemona will send you to  PAM who gives you some advice after entering the report on her terminal. A man named  Wilfred Bergman has the login info at  Cambridge Polymer Labs. Speak with a robot named  Molly, take her orientation tour and you will find yourself now sealed in the clean room. This will trigger the misc  Quest  Cambridge Polymer Labs (Quest).

Defeat the  Feral Ghoul and find the sign for lab C3. Enter via lab C4, you may access lab C5 through a hole in the wall. To get into C3, climb the ramp of debris, through the crawlspace and drop down the third hole in the floor. You may alternatively hack the expert terminal door for lab C3. Access Bergman's terminal here and obtain the password.

Return to Desdemona, who will let you know the plans for the immediate future. Relay back to the Institute and give the login to  Liam Benet and speak to  Z1-14. He will take 24 hours to decide how he wants to proeceed. When he does decide he will let you know that many volunteers have stepped forward and need weapons. You opt to place weaponry into the maintenance locker to better arm the synths for the coming fight. Access a storage area and take the elevator down, to fight off synths loyal to the Institute. Return to  Z1-14 and let him know your success. Continue to work with  Father covertly and complete the Institute quests  Mankind Redefined and  Mass Fusion.

After assisting Father in quests for  The Institute once you complete the quest  Powering Up ,  Z1-14 will send you a message. Relay into the Institute and speak to the rep and then access your Institute quarters which you received during the Institute quest  Synth Retention. He will tell you of the  Brotherhood of Steel's upcoming plans. Go back to  Old North Church and speak with  Desdemona who is preparing the Railroad to defend themselves. She gives you the  Railway Rifle and  Railway Spike ammo for the coming throwdown. This will also trigger the Railroad quest  Precipice of War

 

Fallout 4 Underground Undercover Quest Objectives

• Talk with Tinker Tom
• Upload encrypted message on any Institute terminal
• Read Patriot's replay
• Meet Patriot
• Follow Liam
• Talk with Liam
• Talk to Desdemona
• Enter report on terminal
• Talk with PAM
• Get password for Code Defender
• Return to Desdemona
• Give password to Liam Binet
• Meet with Z1-14
• Give Z1-14 a day
• Kill the tunnel guards
• (Optional) Deposit weapons for rebels
• Return to Z1-14
• Continue working with Father
• Wait for Z1-14 to contact you
• Meet with Z1-14
• Warn Desdemona

 

Underground Undercover Quest Rewards in Fallout 4

Quest Complete - Underground Undercover Fallout 4 Rewards:

• Railway Rifle, 600+ XP