The vast open world ofFallout 4features many quests with different rewards, including one at Cambridge Polymer Labs. Once devoted to research, this place continues its work even in the desolate Wasteland to create a new type of polymer. As with many missions, your character can get caught up in this place’s experimentation and is forced to either help or fight to escape the laboratory.

Cambridge Polymer Labs has been conducting scientific experiments for nearly 200 years, with at least one ongoing test. Somecompanions inFallout 4will be eager to continue this research, even with the threat of danger within the Labs. Going along with any tests in this location can help you improve your relationship with the NPC Curie if you bring her along during this quest.

A pair of Enclave soldiers in black Power Armor

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How To Start The Cambridge Polymer Labs Quest

Meet A Strange Custodian Of The Laboratory

The first step in starting the Cambridge Polymer Lab quest is tofind a laboratory buildingin the central area of the larger Commonwealth region. Head south from Fraternal Post 115 or west from C.I.T. to quickly discover a large structure with a flat roof. As soon as you approach the main doors of this location,“Cambridge Polymer Labs"will show up as a discovered area that will appear on your map from now on.

The door to this place is unlocked, allowing you immediate entrance without having to pick any locks. Upon entering the Lab, you encounter a Miss Nanny robot named Molly, who acts as the custodian and manager of the employees who once worked there. Molly offers a chance for a job among the Lab’s scientists, which you can answer"Sure"to start the side quest inFallout 4.

Fallout 4 starting the Cambridge Polymer Labs side quest with multiple objectives and choices

Once you complete a quick interview with Molly, the robot will direct you toward a cleanroom after changing into some gear given to you as a reward for being hired. Unfortunately, this is a trap as Molly locks you inside the cleanroom, stating that all employees are on mandatory overtime until a research project is completed. This begins the side quest, where you must figure out how to escape this area.

Molly Interview Answers (& Rewards)

Molly begins your application with an interview since the increased demand for staff in every field has condensed a normally lengthy test into a single question. The robot asks you if you have any experience with Polymer Synthesis, to which you are given four options to respond. Depending on how you answer, you are given a different job description by Molly and a set of items as rewards to match this new role.

Rewards If Picked

Fallout 4 Molly robot from Cambridge Polymer Labs conducting an interview on player character

Security

Patrolman Sunglasses, 1x Baton, Dirty Army Fatigues

When you receive your job description and rewards, you can choose to have Molly give you an orientation detailing the history of the Lab and its research, but this is an optional part of the quest.

The"You Need Me"responserequires a Charisma check to pass, which may be easier for those who have created certainbuilds for their character inFallout 4. Failing to pass this check means Molly has designated you as a lab assistant instead of the sales coordinator role. This position does not get you any rewards, though you can still loot the Labs for items before entering the cleanroom to start the quest.

A ghoul, mutant, and robot from Fallout 4 with Silver Shroud.

How To Escape The Cambridge Polymer Labs

Complete The Research Or Shoot Your Way Out

You have two objectives to complete this quest:help Cambridge Polymer Labs finish their researchorfind another way to escape. The cleanroom your character is trapped in has a terminal detailing the progress made in the Lab’s experiments. You will have to advance some parts of this research no matter what choice you decide to follow during this part of the mission.

Finish The Research

Those looking to complete the research have tocreate a new polymerby gathering chemical reagents and using a fabricator to assemble an item. The fabricator is in the cleanroom with a terminal that details the materials needed to continue this operation. To meet the fabrication parameters, you need tocollect two Reagent Chemicals and one Radioactive Isotopefrom within the facility.

As you can see in the above video by YouTube creatorCharlatan Wonder, the two reagent chemicals you can find in the Lab areGoldandLithium Hydride. This area of the lab has a variety of different chemicals scattered in tubes, which are labeled as unidentified samples inFallout 4at first. You have toscan possible samplesin the fabricator to identify the two chemicals you need to finish the experiment.

Fallout 4 Piezonucleic Power Armor chest piece reward from completing the Cambridge Polymer Labs quest

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The Lithium Hydride comes from Sample 3111, located in a storage space to the left of the cleanroom. However, the Gold can only be found on the second level of the Lab, a place you have to reach by traveling across narrow walkways until you’re able to drop into a locked room. Sample 611 can eventually be gathered in this space after you defeat a tough Ghoul enemy, preferably with one ofFallout 4’s melee weapons.

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Access the terminal in the room with the Gold to gain a password that opens a nearby containment room. When you enter this room, an alarm will sound, and a powerful Glowing One enemy will appear for you to defeat before you move forward. Once you kill this rare type of Ghoul, continue until you find the Radioactive IsotopeU-238, which you may combine with the chemicals at the fabricator to finish the research.

Find Another Way To Escape

For those uninterested in finishing the research, all you have to do isaccess the terminal in the room with the Gold sample and pick another option. Instead of opening the containment room, pick the"Facility Defense Systems"prompt to activate the emergency override. This will disable Molly’s lockdown, opening up the rest of the Lab and automatically gunning down the remaining Ghouls left inside.

The"Underground Undercover"quest requires a password from Dr. Bergman’s office in Cambridge Polymer Labs, which is the same place as the Gold sample. If this quest is still ongoing as you are within the lab, you will be required to leave the area.

Go back to the cleanroom andtake down Mollyto free the path forward to your escape. Unfortunately, the same turrets you activated will now be hostile to you, forcing you into combat until you can fight back outside. You will have little time to loot for any items you missed or investigate the bodies of dead Ghouls as you are assaulted by various defensive systems inFallout 4,blocking your path.

Rewards & Items Not To Miss

Craft One-Of-A-Kind Items And Increase Stats

Completing the Lab’s research with the right chemicals and isotope creates thePiezonucleic Power Armor Chestpiece, an extremely strong piece of defensive gear. This item is your key reward for finishing the quest this way, rewarding those who pursue scientific experiments. Depending on your level, this Power Armor could be for the T-45 or T-51 Set, with the latter being the stronger.

The Power Armor you create has a special ability that allows your character toreceive accelerated Action Points whenever you are exposed to radiation. With how many places and enemies are irradiated in the Wasteland, this skill can be incredibly strong at all points of your adventure. In fact, this ability is so strong that you should consider using a rare glitch toduplicate this item inFallout 4.

The Piezonucleic Power Armor can also be completely customized with gear mods that bolster the item’s strength even further and possibly give it new traits.

When you finish the experiment, instead of shooting your way out, you also gain access to the office of the Lab’s president. This space has some items you may not want to miss looting, including theMassachusetts Surgical Journal, which permanently allows you to inflict +2% limb damage to enemies. Search this room and access the Director’s Terminal for more information about the location.

Once you have found everything you need, you must walk out of the area to continue your journey. Don’t forget to search every room and take down every Ghoul to loot their bodies for common items that may be able to get you a few Caps. The"Cambridge Polymer Labs"quest inFallout 4may not be the most difficult to complete, but it has some of the best rewards.