Need some help with a little scripted sequence.

I mostly map for L4D/TF2 so I’m not too familiar with the scripted sequences in HL2. Right now I have a rebel that gets your attention when you walk into a hallway. Then I want him to walk over to a door and start knocking on it, but I don’t know how to make him walk over to it and begin the sequence. A little help?

How would you implement this? NPC in multiplayer maps is mostly not a good idea. Or is this for L4D singleplayer?

You might find something of interest here
http://www.halfwit-2.com/?page=tutorials&category=15

Oh no. I’m making a quick Half-life 2: episode two map. Sorry for the confusion.