Fallout Wiki
Fallout Wiki

I'm currently investigating the local Nightstalker population since they seem to have developed a natural stealth field.Doctor Henry

Guess Who I Saw Today is a side quest in Fallout: New Vegas.

Quick walkthrough[]

Side Quest: Guess Who I Saw Today 
Reach Jacobstown and speak with Doctor Henry in the lodge
(Optional) Recruit Lily to help fight night stalkers
Reach Charleston Cave and retrieve the chewed Stealth Boy
Return to Doctor Henry. 
Speak with Lily about aiding Doctor Henry's experiments. 
Deal with Keene
Attack and kill Keene and his nightkin or
hand over the Mark II prototype and let him leave. 
Pass an 80 Speech skill check to convince Keene to stand down. 
Decide the outcome of the nightkin cure. 
Tell Doctor Henry to stop his experiments 
Allow Lily to continue using the Mark II prototype or
pass a 90 Science skill check to suggest a more efficient testing method. 
Reward:500 XP
Lily Bowen as a companion. 

Detailed walkthrough[]

The quest is started by traveling to Jacobstown near Mount Charleston in the northwest of the Mojave Wasteland. One will be met at the gate by the town leader, Marcus and can ask several questions about his town and its history. One must then enter the main lodge (go straight from the fence entrance past the old sign and bighorner pen). If entering for the first time, a nightkin named Keene will be standing to the left of the door and remark with disgust at there being "another human" and "one was enough;" one can talk with him about the state of mutant affairs in Jacobstown and information about life as a nightkin. The one to talk to in the lodge is Doctor Henry in the laboratory to the right of the entrance, where he works alongside his ghoul assistant Calamity, trying to find a cure for the schizophrenia plaguing all nightkin due to their excessive usage of Stealth Boys.

Note: If one came to Jacobstown to bring Doctor Henry to the meeting of the Enclave remnants during For Auld Lang Syne, he will refuse to leave until he has completed his research for the cure, requiring one to offer their help in finishing his work.

Medical miracles[]

On elaborating further on his experiments, Doctor Henry says that he has so far pursued two avenues of making a cure: testing out an experimental, stronger Stealth Boy Mark II prototype to observe the effects on nightkin, and studying specimens from the local population of night stalkers that have somehow managed to develop a stealth-field-like ability akin to using a Stealth Boy; because the former avenue carries the risk of inflicting severe, even irreversible damage on the test subject, Henry wants to look further into the latter, and sends the player character to investigate the creatures' lair in the nearby Charleston Cave. He also suggests bringing along Lily Bowen, a nightkin and town shepherd that has dealt regularly with night stalkers and can provide backup against them; she resides just outside the door to the lodge and from then on becomes available as a companion.

From the exterior of the wooden fence around Jacobstown, circle around to the northwest and scale the snowy cliffs to reach Charleston Cave. Inside, the cave system is fairly linear, with the only enemies being several night stalkers that are (mostly) invisible until they attack. Finishing the objective requires entering a chamber at the back of the cave where a dead nightkin lies next to a chewed Stealth Boy, the cause of the night stalkers' invisibility. One can also acquire the unique super sledge Oh, Baby! in the same chamber next to the body.

With the evidence in hand, return to the lodge back at Jacobstown. When shown the chewed Stealth Boy, Doctor Henry declares the night stalker study a dead-end and will have to resort to using the Mark II prototype as the only remaining line of research viable to produce results, with Lily as his current experimental subject. Speak with Lily to confirm her willingness to take part in the experiment, even at the cost of potentially damaging her mind beyond repair and follow her to the laboratory.

Note: If one talks to Lily while they are away from Jacobstown, she will run back to Jacobstown. If one needs her, they should be mindful of where this conversation takes place.

Note: Make sure that Doctor Henry actually does the experiment; it should not take more than 30 seconds for him to start. In the event nothing happens, pushing him closer to Lily can cause the script to activate, which will continue the quest as normal, with some minor exceptions; If Calamity is not in the room, her voice lines won't play. This can be fixed by leaving the room, and waiting for 15 seconds, which will cause the quest to progress to the next step. Furthermore, due to incorrect package variables if done in this fashion, Doctor Henry will sit down and not move from his chair until he must be spoken to to end the quest.

The fate of Jacobstown[]

With Lily at his disposal, Doctor Henry has her activate the Mark II prototype and observe the symptoms she exhibits while under its influence, until he eventually gathers enough useful data. However, soon after concluding the experiment, Keene and a group of nightkin burst into the laboratory, demanding they be given the Mark II prototype, or else they will take it by force. Asking Keene about his reasons reveals that he intends to take his nightkin from Jacobstown and use the Mark II prototype's specifications to upgrade more Stealth Boys for them to use as they see fit, ignoring the likelihood they will go even crazier, attack the human populace in their madness, and stoke more anti-mutant hatred against places like Jacobstown.

The choices made here will affect the ending for Jacobstown as a whole.

Resolving the dilemma with Keene can be accomplished via one of the following:

  • Pass an 80 Speech skill check to convince Keene to relent and keep the nightkin at Jacobstown for the time being.
  • Comply with Keene's request and give him the Mark II specs, which will cause him to leave peacefully.
  • Refuse to give Keene the Mark II specs, and he and the two other nightkin will attack and must be killed.
    • One can easily draw the three of them outside and let the super mutants help with the fight.
    • One can also go in the corner (where the wheeled tables are) to prevent the nightkin from attacking (or delaying them).
    • It is possible to use a Stealth Boy and reverse pickpocket a C4 plastic explosive onto Keene and his 2 nightkin before speaking with him. This way, if one chooses to fight them, a detonator can be used to kill all 3 at once.
    • Lily will leave the lodge as Keene is coming into the room, and will not help with the fight.

Once the situation with Keene has been resolved, one must speak with Doctor Henry again. He explains that the data he recorded from Lily's earlier test has proven promising, but to fully complete the cure, he will need her to continue using the Mark II prototype, similarly risking damage to her already-addled mind to a point beyond healing. One has three options for making a decision:

  • Tell Doctor Henry to resume his experiments and have Lily continue to wear the Mark II prototype.
  • Pass a 90 Science skill check to propose a more efficient testing method that won't risk Lily's health.
  • Tell Doctor Henry to stop his experiments with the Mark II prototype and preserve Lily's health.

The quest will complete upon making a decision regarding the nightkin cure, earning 500 XP (590 if the Science check was passed).

Quest stages[]

StageStatusDescription
10 Look for the source of the night stalker stealth mutation.
15 (Optional) Ask Lily to help you investigate the night stalker mutations.
16 Keep Lily alive.
20 Tell Doctor Henry you've discovered a potential cause for the night stalker mutations.
30 Talk to Lily about participating in Doctor Henry's experiment.
40 Tell Doctor Henry to proceed with the experiment once Lily is present.
50 Wait for Doctor Henry to complete the experiment.
60 Speak with Keene and try to defuse the situation.
65 Kill the hostile Nightkin.
70 Speak with Doctor Henry.
80Quest finishedDecide whether or not Lily should continue to wear the Mark II prototype and inform Doctor Henry.

Notes[]

  • Regardless of the quest outcome, it is impossible to acquire the Stealth Boy Mark II prototype.
  • Having the Animal Friend perk makes the first half of this quest significantly easier, as the night stalkers in the cave will leave the player character alone while searching for the chewed Stealth Boy.

Behind the scenes[]

Bugs[]

  • Playstation 3Playstation 3Playstation 3 Xbox 360Xbox 360 Immediately after using the speech option with Keene telling Doctor Henry to do as he says, there will be a black screen crash.[verified]
  • Xbox 360Xbox 360 Sometimes, if you beat Lily to the lodge trying to exit the building again will cause a black screen crash. There is no fix for this at this time aside from exiting the game, erasing all add-on content (including patches) and loading the game with out the add-ons.[verified]
  • Playstation 3Playstation 3Playstation 3 If you come back to the lodge while the quest "Eureka!" is active, Doctor Henry may not respond to you talking to him, resulting in it being impossible to finish the quest.[verified]
  • Xbox 360Xbox 360 If you go into V.A.T.S. on Lily while she is testing the Stealth Boy MK II and she is invisible she will turn visible. However, this will not affect the quest.[verified]
  • PCPC Playstation 3Playstation 3Playstation 3 Xbox 360Xbox 360 If you ask Lily to help Doctor Henry while she is waiting in the Presidential Suite of the Lucky 38 without asking her to come with you, she will immediately leave to go speak to Doctor Henry. When you return to Jacobstown Lily will not be present anywhere, but you can stil talk to Doctor Henry to initiate the quest. He will go through the dialogue one sentence at a time, and the only solution to get the quest finished is to leave the building and return to Doctor Henry after each line. Please note that this solution does not work on Xbox 360 and PC. This may be fixed on the PC by using console commands.[verified]
  • PCPC If you have already stealth killed the two other Nightkin that follow Keene (even if nobody saw you do it) Doctor Henry and Calamity will suddenly become hostile upon Keene entering the room without his buddies, instantly failing the quest (being out of sight and/or Hidden will not prevent the Doctor and Calamity from becoming hostile).[verified]

References[]

Non-game

Main quests
Act 1Ain't That a Kick in the Head · Back in the Saddle · By a Campfire on the Trail · They Went That-a-Way · Ring-a-Ding-Ding!
Act 2Wild Card (Wild Card: Ace in the Hole, Change in Management, You and What Army?, Side Bets, Finishing Touches) · The House Always Wins (I, II, III, IV, V, VI, VII, VIII) · Render Unto Caesar · Et Tumor, Brute? · Things That Go Boom · Kings' Gambit · For the Republic, Part 2 · You'll Know It When It Happens/Arizona Killer
Act 3No Gods, No Masters · All or Nothing · Veni, Vidi, Vici · Eureka!
Side quests
New California RepublicAnywhere I Wander · Back in Your Own Backyard · Bitter Springs Infirmary Blues · Boulder City Showdown · Can You Find it in Your Heart? · Climb Ev'ry Mountain · Don't Tread on the Bear! · Emergency Radio · Eye for an Eye · Flags of Our Foul-Ups · Hard Luck Blues · I Don't Hurt Anymore · I Put a Spell on You · Keep Your Eyes on the Prize · Medical Mystery · No, Not Much · Pressing Matters · Restoring Hope · Return to Sender · That Lucky Old Sun · The White Wash · There Stands the Grass · Three-Card Bounty · We Will All Go Together · You Can Depend on Me
Caesar's LegionBeware the Wrath of Caesar! · Caesar's Favor · Caesar's Foe · Caesar's Hire · Cold, Cold Heart · I Hear You Knocking · The Finger of Suspicion · We Are Legion
The StripBeyond the Beef · Bye Bye Love · Classic Inspiration · How Little We Know · Pheeble Will · Talent Pool · The House Has Gone Bust! · The Moon Comes Over the Tower
Freeside & Outer VegasBirds of a Feather · Bleed Me Dry · Debt Collector · G.I. Blues · High Times · Someone to Watch Over Me · The Coyotes · Wang Dang Atomic Tango
BoomersAnt Misbehavin' · Sunshine Boogie · Volare! · Young Hearts
Great KhansAba Daba Honeymoon · Cry Me a River · Don't Make a Beggar of Me · Oh My Papa
Powder GangBooted · I Fought the Law · Run Goodsprings Run · Why Can't We Be Friends?
Brotherhood of SteelEyesight to the Blind · Still in the Dark · Tend to Your Business
OtherCome Fly With Me · Crazy, Crazy, Crazy · Ghost Town Gunfight · Guess Who I Saw Today · Left My Heart · My Kind of Town · The Legend of the Star and A Valuable Lesson · Unfriendly Persuasion · Wheel of Fortune
Companion questsED-E My Love · For Auld Lang Syne · Heartache by the Number · I Could Make You Care · I Forgot to Remember to Forget · Nothin' But a Hound Dog · One for My Baby
Unmarked questsA Bit of Slap and Tickle · A Final Plan for Esteban · Access Powers · All Fired Up! · An Ear to the Ground · Andy and Charlie · Arachnophobia · Arizona Scavenger · Barton the Fink · Bear Necessities · Big Winner (Atomic Wrangler, The Gomorrah, The Tops, Ultra-Luxe, Vikki & Vance) · Bounty Killer (I, II) · Brotherhood Bond (I, II) · Caching in at the Cove · Cajoling a Cudgel · Claws Mended · Claws Out · Dealing with Contreras · Defacing the Humble Stone · Democracy Inaction · Eddie's Emissary · Exhumin' Nature · Fight Night · Flogging a Dead Corpse · Friend of the Followers · Gland for Some Home Cooking · Harder, Better, Faster, Stronger · Hat's Entertainment · Help for Halford · Hidden Valley computer virus · Highway to the Danger Zone (I, II) · Honorary Rocketeer · I Love Bananas · Iron and Stealing · Keith's Caravan Charade · Laurifer Gladiator · Lenk's Bad Debts · Lily and Leo · Long-Term Care · Malleable Mini Boomer Minds · Maud's Muggers · Meeting an Equal · Missing a Few Missiles · Most Wanted · Not Worth a Hill of Corn and Beans · Old School Ghoul · A Pair of Dead Desperados (I, II) · Papers, Please · Pistol Packing · Playing on the Old Joana · Powder to the People · Power to the People · Razzle Dazzle! · Reach for the Sky, Mister! · Rest and Resupply · Ringo's Caravan Rules · Rotface's Loose Lips · Saving (or Savaging) Sergeant Teddy · The Screams of Brahmin · Silus Treatment · Short-Term Treatment · Smooth-Talking Criminal · The Star Showdown · Strategic Nuclear Moose · Straus Calls · Strip Search · Suits You, Sarah · Tags of Our Fallen · A Team of Moronic Mercenaries · Thought for the Day · Tourist Traipse · Trudy's Radio Repair · A Trusted Aide · Useless Baubles or Fancy Trinkets? · We Must Stop Beating Like This · We Must Stop Meeting Like This · Wind-Brahmin Wrangler · You Gotta Break Out a Few Eggs · You Make Me Feel Like a Woman
Cut contentCut questsAuto-Inject Quest · Bright and Shiny · Chip Provenance · Debug Topics · Exploring Vault 74 · Jailhouse Rock · Meat of Champions (quest) · TempMan · Underpass Water Purifier · Viva Las Vegas! · Welcome to Fabulous New Vegas · World Changes Post-Endgame
Add-on quests
Dead MoneySierra Madre Grand Opening! · Find Collars (8: "Dog", 12: Christine, 14: Dean Domino) · Fires in the Sky · Strike Up the Band · Mixed Signals · Trigger the Gala Event · Put the Beast Down · Last Luxuries · Curtain Call at the Tampico · Heist of the Centuries · Big Winner, Sierra Madre · Return to the FountainCut content
Honest HeartsA Family Affair · Arrival at Zion · Bighorners of the Eastern Virgin · Chaos in Zion · Civilized Man's Burden · Crush the White Legs · Deliverer of Sorrows  · Departing Paradise · Flight from Zion · Gathering Storms · Gone Fishin' · Happy Trails Expedition · Prisoners of War · Retake the Bridge · River Monsters · Rite of Passage · Roadside Attraction · Sanctity of the Dead · The Advance Scouts  · The Treacherous Road · The Grand Staircase · Tourist Trap
Old World BluesAll My Friends Have Off Switches · A Brain's Best Friend · Coming Out of Her Shell · Field Research · He Came... And Went · Influencing People · Midnight Science Fiction Feature! · Old World Blues · On the Same Wavelength · Picking Your Brains · Project X-13 · Sonic Emitter Upgrade · Welcome to the Big Empty · What's in a Name? · When Visitors Attack! · X-2: Strange Transmissions! · X-8 Data Retrieval Test · X-8: High School Horror! · X-13: Attack of the Infiltrator!
Lonesome RoadThe Reunion · The Silo · The Job · The Launch · The Tunnelers · The Divide · The Courier · The End · The Apocalypse