Gordon in Kleiner's lab.

Gordon escapes police raid narrowly.

Citadel seen in the distance.

Man walking through a city.

A man and a doctor shaking hands.

Barney with Dr Kleiner and Gordon.

Man interrogated by Black Ops agent.

Armed police officers welcome arrivals to City 17.

Gordon exits a train platform.

Couple talks about city transfer.

Train carrying Gordon Freeman awakens.

Train arriving at City 17 station.