The Dark Age (Season 2, Episode 20):

Cut to the hospital ER entrance that night. Buffy is waiting on Giles.

Buffy: (exhales) 'Don't be late.' Sheesh.

She walks over to a pay phone to try calling, but stops when she sees the blood van pull up. The driver gets out with his clipboard as two ER doctors come out to meet him.

Driver: Hey, fellas.

Doctor: Hey.

Buffy: All's well that ends with cute ER doctors, I always say.

She watches them go to the back of the van and get out the insulated container. They start back with the driver, and he gets back into the van. Buffy realizes something's wrong.

Buffy: Since when do doctors take deliveries?

The van backs out of the ambulance slot. The doctors wave to the driver.

Doctor: See ya.

The van drives off, and behind it a car engine starts and a pair of headlights come on. The old convertible pulls up into the light as the doctors set the container down. One of them opens the lid, takes out a bag of blood and begins to suck on it. The driver of the car gets out.

Driver: Hey! No sampling the product!

The doctor vampire hisses, but puts the bag back down and drops the lid closed. Buffy runs to attack. She kicks the first doctor vampire down, then the second, and does a roundhouse kick to the driver's face. The first one gets up, and she tries kicking him again, but he grabs her leg and throws her onto the hood of the car. She scissor kicks him in the neck, and he staggers away and falls. A fourth vampire runs up as Buffy gets up and takes out a stake. She turns to attack him.

Buffy: Angel!

Angel: Buffy! Look out!

He jumps up onto the car's hood and leaps off to tackle the driver vampire coming at her from behind. Angel punches him in the face, but he stays up. The second vampire jumps up onto the hood and swings at Buffy. She ducks the punch and jabs him in the chest. The first vampire jumps up on the hood, too, and Buffy knocks him back off with a punch to the face. She punches the second one in the face, too, and he falls down on the hood on his back. She jumps off of the car and thrusts her stake
into the first vampire as he tries to get back up. The second one is off the car again and grabs her by the shirt from behind. She swings around with the stake and gets him in the chest also. Angel, in the mean time, roundhouse kicks the driver and sends him spinning into the car. The vampire quickly sits up in the driver's seat and floors it as Angel tries to chase him. The car races off, leaving Angel and the blood behind. Buffy opens the lid to check on it.

Buffy: How did you know about this?

Angel: It's delivery day. Everybody knows about this. They only ruined one bag.

Buffy stands up and looks after the car, which is long gone. Angel kicks the lid back closed.

Buffy: Do you think you could make sure the hospital gets the rest?

She realizes whom she's just asked to do that and raises her eyebrows at him. Angel just nods, not insulted by the query.

Buffy: Thanks. I'm worried about Giles. He was supposed to meet me here.

Angel: Maybe he's late.

Buffy: Giles? Who counts tardiness as, like, the eighth deadly sin?

Angel: Right. Go.

She gives him a final look and hurries off.

[Later, at the end of the episode]

Jenny/Eyghon: I've been waiting a long time to do this.

As she bends down to grab Giles Angel runs in through the door, grabs her and pulls her to the crate, banging her head into it. He takes her by the neck and starts to choke her. Willow, Xander and Cordelia run in next. Willow holds Giles back as he gets up.

Giles: He's killing her!

Willow: No! Trust me! This is gonna work!

Angel continues choking Jenny/Eyghon. Xander helps Buffy up. Finally Eyghon has to jump and does so, right into Angel. He drops Jenny as he's thrown back into the wall and begins convulsing. When Jenny hits the floor she is herself again. Willow lets go of Giles, and he immediately gets on his hands and knees next to her.

Giles: Jenny!

Angel's face twists and contorts as the demons inside of him fight it out. He is thrown to the crate and hits his head. His face goes through a few more contortions when Eyghon suddenly appears, apparently gaining the upper hand. After a moment Angel's face shifts back to normal, then back to Eyghon, then back to normal again. He is thrown back against the wall. Another moment's struggle and the demon inside Angel throws Eyghon out. Without a host body to occupy Eyghon quickly crumbles into ashes. Angel gasps and collapses to the floor. They all run over to his aid. Giles reaches out to Jenny. She shifts to look at him.

Giles: Jenny!

Jenny: Rupert...

Ethan gets up and runs from the shop.

Buffy: You knew that if the demon was in trouble it was gonna jump into the nearest dead person.

Angel: I put it in danger.

Willow: And it jumped. (stands up)

Angel: (gets up) I've had a demon inside me for a couple hundred years... (exhales) just waitin' for a good fight.

Buffy: Winner and still champion.

Xander: Uh, I think that Ethan guy disappeared again.

Buffy: Darn. I really wanted to hit him till he bled.