Murphy's Bombing Run

 refers to an unmarked and repeatable quest in Fallout 3.

Murphy is a ghoul scientist stationed just inside Northwest Seneca Station who is working on an improved version of the drug Jet, known as Ultrajet. However, he needs your help with one of the ingredients: Sugar Bombs.

For every box of sugar bombs that you bring him, he will pay you a decent amount of caps. You can then purchase Ultrajet from him as you turn in Sugar Bombs. It seems you can purchase 1 Ultrajet from him (around 70 caps each) for every 8 boxes of Sugar Bombs you turn in.

When you first talk to him and discover he is making Ultrajet, he offers you 15 caps per box of Sugar Bombs that you bring him. You can convince him to pay 30 caps per box by passing a Speech check.

The first time Murphy offers you a look at his inventory, which includes Ultrajet and a handful of other drugs, he will have zero caps. Once you purchase Ultrajet from Murphy, you can sell him any items in your own inventory to get some or all of the caps back. However, any items you sell him will automatically disappear from his inventory, so do not sell him anything important.

Even though he is manufacturing highly addictive narcotics, killing Murphy and his bodyguard will result in negative Karma.

Bugs

 * Sometimes if you give him over 8 Sugar Bombs at once the speech option to give him more will disappear. To correct this reload the game.