Exploring the vast wasteland of Fallout: New Vegas leads players to numerous complex moral dilemmas and memorable side quests. Among these, Guess Who I Saw Today stands out as a pivotal mission involving the Nightkin community and their psychological struggles. Completing this quest not only helps Doctor Henry with crucial research but also determines the ultimate fate of Jacobstown.

Locating Jacobstown and Starting the Quest

To begin this assignment, players must travel to the mountain sanctuary of Jacobstown located in the northwestern region of the Mojave Wasteland. Upon reaching the main lodge, head inside to meet Doctor Henry working in his laboratory alongside Calamity. He will explain his active research into curing Nightkin schizophrenia caused by long-term Stealth Boy usage.

Before embarking on the field research, you can optionally recruit Lily Bowen, a friendly Nightkin living in Jacobstown, to serve as your companion. Lily provides strong support during combat and offers valuable insight during the quest line. Be sure to initiate this quest before finalizing certain late-game factions, as Doctor Henry may become unavailable otherwise.

Investigating Charleston Cave for Answers

The quest requires players to travel nearby to Charleston Cave to search for the source of a unique Nightstalker stealth mutation. Navigating the winding caverns involves battling aggressive Nightstalkers that naturally utilize stealth capabilities. Bringing high-damage weapons or leveraging the Animal Friend perk can make exploring this hazardous cave much easier.

Deep within the cavern, search near the fallen Nightkin body to locate a chewed Stealth Boy. Retrieving this key item explains how the creatures absorbed the stealth mutation into their biology. Once you collect the item, make your way back to Jacobstown to present your findings to Doctor Henry.

Confronting Keene and Resolving the Tensions

After returning the chewed Stealth Boy, Doctor Henry will request that Lily volunteer to test the modified Mark II prototype. During the experiment, an agitated Nightkin named Keene enters the laboratory demanding the research data for himself. Players must handle this tense situation carefully to keep peace inside the sanctuary.

You can defuse the conflict peacefully by passing an 80 Speech skill check to convince Keene to stand down. Alternatively, handing over the Mark II specifications allows Keene to leave without violence, though refusing his demand triggers an immediate fight. Resolving this standoff ensures the safety of Doctor Henry and preserves the stability of Jacobstown.

Deciding the Future of Nightkin Schizophrenia Research

With Keene handled, you must make a final choice regarding how Doctor Henry proceeds with his research. Advising him to continue the trial risks damaging Lily's mental health further, while halting the test protects her state. Players with a 90 Science skill check can suggest an alternative testing method that advances the cure without risking Lily's mind.

Choosing the best path offers 500 XP along with significant lore implications for the future of the Nightkin species. Balancing scientific advancement with moral compassion makes this side quest one of the most rewarding narrative experiences in New Vegas. Make your decision wisely to secure a better outcome for all inhabitants involved.