Complete the New Growth side story by asking people about Dr. Rays Underhill, gathering the required research equipment at the workbench inside the sewer lab, defeating the mold test subjects, and giving Dr. Underhill their samples.
Ask around about Dr. Rays Underhill. Your search during New Growth takes you from The Park to Central Executive, then to Underhill’s apartment and sewer lab.
Follow Underhill’s trail to Central Executive
The FBC Base outpost is in The Park. About Underhill’s last known location, the search area covers a building containing FBC equipment. The rooftop table holds Underhill’s Resignation Letter and a Level 6 Keycard.
STEP 1/4
25%
Ask about Dr. Underhill
Follow the initial objective to ask around about Dr. Underhill.
STEP 2/4
50%
Speak with Busken
Find Busken at the FBC Base outpost in The Park. Your objective changes to investigating Underhill’s last known location.

STEP 3/4
75%
Search the rooftop table
Collect the items there to receive the objective to investigate Underhill’s office.

STEP 4/4
100%
Go to Central Executive
Make your way to Underhill’s office in Central Executive.
From the Oldest House: Central Executive Fast Travel arrival point, the office is the second locked door on the left. Enter Underhill’s office through the door.

Find Underhill in her apartment
Underhill’s apartment is back in The Park. The objective marker leads to a building with Mold enemies blocking its entrance; her apartment is one floor up, on the left, and she is near the kitchen.
STEP 1/3
33%
Take the apartment key
Pick up the key from the desk in Underhill’s office. Your objective changes to searching her apartment.
STEP 2/3
67%
Speak with Underhill
Reach her apartment and talk to her about the missing test subjects.
STEP 3/3
100%
Collect the sewer lab key
Take the Key to Underhill’s Sewer Lab from the counter. The quest now calls for equipment and the test subjects.

Collect the equipment in Underhill’s sewer lab
The quest marker leads to an underground entrance. Inside the testing facility, the laboratory door is on the left and opens with Underhill’s key.
STEP 1/1
100%
Gather the research equipment
Collect the items from the sewer lab workbench: one Mold Growth Stimulator and one Sample Tube.

Defeat the test subjects and return their samples
The trail begins below the railing deeper in the lab. Use the tracking prompt as it appears and follow the Mold to its first fork. The left branch leads to Specimen A; after that encounter, the other trail runs toward The Park and splits again. Each of those branches ends at another test subject, and you can take them in either order.
STEP 1/3
33%
Defeat the test subjects
Track down the Mold test subjects, defeat them, and collect their test tube samples.

STEP 2/3
67%
Return to Underhill
Once the subjects are defeated and their samples collected, follow the updated objective back to Dr. Underhill.
STEP 3/3
100%
Hand over the samples
Give Underhill the samples to complete New Growth.
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