Dr. Raya Underhill is one of the collectible bundles in the Control Resonant Archives, with 9 documents on her research into the Mold. Most of them turn up during the side story New Growth, in her Central Executive office in Downtown, her Sewer Lab and a rooftop research site in the Park. Here is where you find every Dr. Raya Underhill collectible, in the same order as the in-game menu.
Related Guides:
Astral Plane Breach Collectibles
Underpass Accounts Collectibles
Control Resonant Game Guides & Collectibles Hub
1 – Welcome Letter
Quest: New Growth
Location: Central Executive, Downtown
Collectible Category: Dr. Raya Underhill (1 of 9)
Description: A letter welcoming Dr. Underhill as a new contractor for the Federal Bureau of Control.
In the Park side story New Growth, you get the Security Level 6 keycard to Dr. Raya Underhill’s office in Central Executive, Downtown. The Welcome Letter is on the big square desk in the office to the right, together with Dr. Underhill’s Apartment Keys.
2 – Underhill’s Personal Notes
Quest: New Growth
Location: Central Executive, Downtown
Collectible Category: Dr. Raya Underhill (2 of 9)
Description: Notes from Underhill’s personal journal.
Underhill’s Personal Notes are on the desk inside Dr. Underhill’s office in Central Executive, the office you open with the Security Level 6 keycard from New Growth. The Welcome Letter and Underhill’s Research Notes are in the same office.
3 – Underhill’s Memo
Location: The Park
Collectible Category: Dr. Raya Underhill (3 of 9)
Description: A memo written by Underhill to her team.
East of the FBC Base in the Park, a gym on ground level by the road has been turned into a lab. Underhill’s Memo is inside, in the same lab as Busken’s Note.
4 – Response From Pope
Quest: New Growth
Location: Underhill’s Sewer Lab, The Park
Collectible Category: Dr. Raya Underhill (4 of 9)
Description: A letter from Pope responding to a research request from Underhill.
In New Growth, Dylan finds Dr. Raya Underhill in her apartment, and she hands over the Key to Underhill’s Sewer Lab. Response From Pope is on the table in the Sewer Lab, the same lab as The Mold Growth Simulator.
5 – Underhill’s Research Notes
Quest: New Growth
Location: Central Executive, Downtown
Collectible Category: Dr. Raya Underhill (5 of 9)
Description: Notes from Underhill’s research on the Mold.
Underhill’s Research Notes are in Dr. Underhill’s office in Central Executive, on the back desk of the office on the right, the same office as the Welcome Letter.
6 – Underhill’s Hypothesis
Quest: New Growth
Location: Rooftop Research Site, The Park
Collectible Category: Dr. Raya Underhill (6 of 9)
Description: Notes on Underhill’s hypothesis regarding the Patterning and the Mold.
New Growth leads you to a research site on a roof in the south of the Park. Underhill’s Hypothesis is at this rooftop research site, the same spot as Underhill’s Resignation Letter.
7 – The Mold Growth Simulator
Quest: New Growth
Location: Underhill’s Sewer Lab, The Park
Collectible Category: Dr. Raya Underhill (7 of 9)
Description: Underhill’s notes on the completion of the Mold Growth Simulator.
The Mold Growth Simulator is on the table in Underhill’s Sewer Lab, which you open with the key Dr. Underhill gives Dylan in her apartment during New Growth. Response From Pope is in the same lab.
8 – Busken’s Note
Location: The Park
Collectible Category: Dr. Raya Underhill (8 of 9)
Description: A note written by Busken, a Ranger working with Underhill.
Busken’s Note is in the gym turned into a lab on ground level east of the FBC Base, the same lab as Underhill’s Memo.
9 – Underhill’s Resignation Letter
Quest: New Growth
Location: Rooftop Research Site, The Park
Collectible Category: Dr. Raya Underhill (9 of 9)
Description: Underhill’s letter of resignation from the FBC.
At the rooftop research site in the south of the Park, where New Growth leads you, Underhill’s Resignation Letter is on the table. Underhill’s Hypothesis is at the same research site.
About Control Resonant
Sequel to: Control (2019)
Release: September 24th, 2026
Developer: Remedy Entertainment
Publisher: Remedy Entertainment
Official Website: https://www.remedygames.com/
