Episode 6: The Cautionary Tale of Numero Cinco
When Gunn brings 
  some documents to Angel to sign, Angel confesses that he feels disconnected 
  in his new position, despite the lavish surroundings and increased opportunities 
  to do good. During the conversation Wolfram and Harts elderly mail guy 
  (known as Number 5 because he wears a hooded 
  mask with that numeral on it) picks up a stack of mail from Angels desk 
  and toddles off down the hall. A moment later Angel notices Number 5 forgot 
  an envelope, so he chases after Number 5 and grabs his arm. To Angels 
  surprise, frail Number 5 tosses Angel through a window and then calmly squeaks 
  away with his cart. Then, as Gunn calls security, Wesley reports that four bodies 
  were just discovered with their hearts ripped out at a special mass for the 
  Mexican Day of the Dead. Angel, Gunn, Wes, and Spike drive to East L.A., where 
  they find yet another body with its heart missing. Then a large demon resembling 
  an Aztec warrior attacks them. Angel and the others fight back but their weapons 
  have no effect, and finally the demon shoves Angel into a dumpster and disappears. 
  
  
  Later at Wolfram and Hart, Fred analyzes the demons blood while Wesley 
  searches ancient texts for 
  information on the demon. Spike asks about the Shanshu prophecy, which predicts 
  an epic battle and a vampire with a soul who plays a major role in the battle 
  and may get to live again. Spike notes that hes a vampire with a soul 
  and that he heroically closed a hellmouth, but Wes says theres no mention 
  of ghosts in the prophecy. Later Wesley shows Angel a picture of the warrior 
  demon, explaining that it returns every 50 years, on the Day of the Dead, seeking 
  human hearts. Wes also says that on the demons last visit it was defeated 
  by five brothers who were the champions of their time, and all but one of them 
  were killed in the battle. Angel asks if the surviving brother is still alive, 
  and Wesley says he is
 and they know him.
  
  A bit later Angel knocks at the door of an apartment, which is opened by Number 
  5. He yanks Angel in and slams him into a wall, but this time Angel returns 
  the toss, saying he needs Number 5s help in defeating the Aztec warrior 
  demon. Number 5 insists hes retired, but Angel says hed honor the 
  memory of his dead brothers by helping. At the mention of his brothers, Number 
  5 shows Angel a small Day of the Dead altar which contains, among other items, 
  a picture of him and his four brothers, once wildly popular luchadores (Mexican 
  wrestlers) who all wear numbered masks like the one Number 5 still wears. Number 
  5 recalls their spectacular career in the ring, and says they also fought gangsters 
  and monsters outside the ring on behalf of the weak and helpless. Angel asks 
  how the brothers defeated the warrior demon, but Number 5 says he cant 
  remember, then recounts how after his brothers died he was so disheartened that 
  he took a job with Wolfram and Hart, even though they stood for everything he 
  hated. He says that ever since, he has built an altar and invited his brothers 
  spirits to visit on the Day of the Dead, but they never come. Angel says its 
  because Number 5s spirit is broken, and asks how that happened. So Number 
  5 takes him to a wrestling arena where five midget wrestlers put on an act mocking 
  Number 5 and his brothers in their fight against the Aztec warrior. Number 5 
  says that despite all his brothers good deeds, they obviously made no 
  lasting difference in the world. 
  
  Meanwhile Gunn and Wes research the warrior demons 
  victims and realize that each of them had performed a heroic act. At the same 
  time, after Angel sees Number 5 to a bus home, the warrior demon attacks him 
  again. Eventually it raises a dagger over Angels head
 but then, 
  instead of killing Angel, it just backs off and disappears. At the office Wes 
  and Gunn tell Angel how the warrior is taking the hearts of heroes, but Angel 
  notes that it let him live, and hes a hero. Wes and Gunn say that if the 
  demon uses hearts for sustenance, Angels dead organ wouldnt do it 
  much good. Gunn goes off to see if the warrior has a contract with Wolfram and 
  Hart, but Wesley stays with Angel and says another reason the demon may not 
  have taken Angels heart is that it can sense, as Wes does, that Angels 
  heart just isnt in his work any more. Wes asks if Angel still believes 
  in the Shanshu prophecy, which is the only thing that will keep Angel from ending 
  up disillusioned like Number 5. Just then Fred summons them to the lab, where 
  she has discovered that human hearts are like rocket fuel to the demon. Spike 
  speculates that its Achilles heel may be its own heart and Gunn confirms this, 
  saying the demon has a contract that allows it to return every 50 years to search 
  for a talisman that can give it infinite powers. Gunn says the talisman, which 
  looks like a gold coin, was given to a hero who was charged with protecting 
  it, and that it gets passed down from hero to hero through the generations. 
  Angel remembers seeing the coin on Number 5s altar and dashes back to 
  his apartment. When he gets there both Number 5 and the altar are gone. Angel 
  finds Number 5 a few minutes later, setting up the altar to summon the demon 
  near his brothers grave at a local cemetery. Angel asks for the talisman, 
  but Number 5 says he doesnt have it. Then the demon appears. As it approaches 
  Number 5 says he swallowed the talisman, and invites the demon to cut it out 
  of him. He taunts the demon until it attacks, but as it swings a sword to kill 
  Number 5, Angel attacks. Eventually the demon gets the upper hand and runs its 
  sword through Number 5. As he falls, Angel attacks, but the demon tosses him 
  into the brothers gravestone. As Angel shakes off the blow, a hand rises 
  from the grave.
  
  As Angel watches, brothers 1 through 4 break out of their grave, ready to fight 
  for Number 5. They grab iron pickets from a nearby fence, and attack the demon 
  lucha-style. Then they pin him to the ground with the fence pickets while Angel 
  drives the demons own dagger through its heart, killing it. Number 5, 
  barely alive, thanks Angel, then admits that the talisman is really in a thermos 
  full of coffee sitting next to them. As Angel retrieves the talisman, Number 
  Five finally dies, and his brothers pick up his body nd vanish once more into 
  their grave. Later Angel delivers the talisman to Wes and tells him that Number 
  5 died a hero. Then, after Wes leaves, Angel returns to Wesleys office 
  alone and pulls out a book to read about the Shanshu prophesy.