Mister Crowley

Mister Crowley is a Ghoul resident of the Underworld in 2277.

Background
Crowley and four other mercenaries - Dave, Jeff Strayer, Dukov, and Tara -were sent to Fort Constantine by Allistair Tenpenny to retrieve a rare weapon. During the mission, Crowley was locked in a room full of Feral Ghouls by Dukov, who wanted to increase his own share of the pay (The feral ghouls were friendly towards him because he was a ghoul). Crowley survived the imprisonment and harbors hatred toward those who left him behind.

Daily schedule
Mister Crowley can usually be found in either The Ninth Circle or in his bed at Carol's Place in Underworld.

Related quests
Mister Crowley gives you a list of four target's he wants dead, why however he does not tell you in the beginning, it turns out that he wants the keys for his own selfish purposes.

Effects of player actions
If you keep the keys for yourself, you can go to Fort Constantine and take the T-51b Power-Armor. However, Mister Crowley won't be too happy with this. Accordingly, he will say only "You stole what was rightfully mine. Get lost." after your acquisition.

Appearances
only appears in Fallout 3.

Behind the scenes

 * Mr. Crowley is possibly named after Aleister Crowley, a famous British writer and occultist. (Aleister Crowley's first name is often misspelled Alistair or Allistair, as in Allistair Tenpenny, the arch-nemesis of Underworld's Mr. Crowley.)

Bugs

 * Crowley may fall 'through' the Potomac River Bridge about two-thirds of the way across, probably due to a glitch in the programming. Crowley will continue his journey after his fall.
 * Occasionally, Crowley will go into a bout of slow motion sprinting, running at nearly half speed but with full striding animation. He will resume normal movement upon his next combat encounter.
 * Crowley may deliver the "You stole what was rightfully mine!" line if the player acquires the Winterized T-51b Power Armor Helmet from the Anchorage simulation.
 * After getting the T-51b Power Armor and T-51b Power Helmet from Fort Constantine by unlocking all the doors, then finishing the You Gotta Shoot 'Em In The Head quest by giving Crowley the keys, and fast traveling back to snatch the armor before Crowley finds out, Crowley has been encountered still friendly in the Presidential Metro, just inside the doors from M.A.R.Go.T., during the Who Dares Wins quest (BS and PL installed prior to beginning Crowley's quest, Steam version of game on PC).
 * Crowley may get stuck on his way to or from Fort Constantine.
 * Mister Crowley might rarely appear at your house still having all of the dialogue options as if he were still in the Underworld. After your encounter, he will walk back to the Underworld.
 * If the player has killed both Dukov and Dave before acquiring the "You gotta shoot 'em in the head" quest, when the player talks to Crowley and gives him Dave's key, the quest log will still say "Bring Dave's key to Mister Crowley", even though you gave him the key, as confirmed by pickpocketing him (you can see the key in his inventory). After you kill all the targets, he will continuously say "You stole what was rightfully mine! Get lost." You still get the experience reward for completing the quest, but you will have no dialogue options with him.