Ambassador Dennis Crocker

 is the ambassador of the Mojave Wasteland for the New California Republic in 2281.

Background
Is the NCR ambassador to the Mojave area.

Interactions with the player character
Crocker writes a letter which an NCR soldier delivers to courier while on the New Vegas Strip. There is also a dialogue option, only if you have Wild Wasteland, where he goes berserk and screams "IM NOT A DOCTOR, IM AN AMBASSADOR!" and then calmly talks to you.

Crocker gives the courier the quest, Things That Go Boom, which duplicates a quest given by Yes Man followed by the quest King's Gambit.

Bugs
If the Courier waits in the Embassy at night when Ambassador Crocker isn't around, waiting for him to appear in the morning/afternoon, he will not appear in the building. All you have to do is take your player and exit the Embassy and re-enter for the Ambassador and his secretary to appear in the Embassy. He will not always reappear though. this has been a bug in this game and you can longer complete quests with the NCR because Crocker disappears permanently.

Appearances
appears in Fallout: New Vegas.