Three-Card Bounty

 is a quest in Fallout: New Vegas.

Quick walkthrough
Violet, Cook-Cook, and Driver Nephi have been giving Major Dhatri a major problem and he wants their heads on a plate.

Detailed walkthrough
Cook-Cook is easily the closest of the bounties to the airport. To avoid a few unnecessary Fiends you must travel north along the highway near the airport until you reach a few Frag Mines. Take a left turn towards Vault 3 and take out the 5 to 8 standard fiends you may encounter. Finally after or while your taking the fiends near the Brahmin pen Cook-Cook will appear with an Incinerator and a Flamer (Fallout: New Vegas). He'll use the incinerator for long range attacks and the flamer for close, so it's recommended that you simply shoot the incinerator out of his hands then walk backwards and shoot while he tries to get into Flamer range. He utilizes armour so Armor Piercing bullets are recommended. Also remember to NOT aim for the head else your pay will suffer.

You can also talk to Little Buster before setting out after Cook-Cook, who informs you that Cook-Cook has a favorite brahmin named Queenie, and that killing Queenie would incite Cook-Cook to fly into a rage, attacking anyone near him, including Fiends. Snipe Queenie and wait for the fighting to end. Since it will be close contact fighting, Cook-Cook's head should remain intact if he's overtaken by the Fiends, and there will be only a few (low on health) Fiends left for the player to fight.

Driver Nephi is the furthest away of the three, however, he is much easier to take care of than Cook-Cook. You are given the option to assemble First Recon at the Samson Rock Crushing Plant, which is just outside where Driver Nelphi is situated. He is surrounded in approximately 5 other Fiends, but these are all quite simple to take out, Driver Nelphi himself is also very easy. He only uses a melee weapon, his golf club - Nelphi's Golf Driver - which, when powerful, is simple to fight against, just keep your distance and, with the help from First Recon, the Bounty is quick and easy.

And finally Violet, who has no other Fiends to support her, but a pack of Dogs. Located just to the West of Cook-Cook's location, you will be confronted with approximately 6 Dogs, 1 of which is Unique - Violetta - who takes slightly more to kill than the other dogs, Violet herself is relatively easy to kill as she doesn't wear specifically tough armour, or use a specifically tough weapon, she uses a Hunting Rifle.