Mike told me about this series the other day. This British sitcom is one of the funniest things I've seen in a long time (as he said)!
The IT Crowd (on YouTube).
There are six episodes and most are uploaded to YouTube in three parts. Be sure to watch the first episode and don't miss the first part of the second episode (the commercial is my favorite scene of the series).
To find some parts I had to search on “The IT Crowd Ep3” or “The IT Crowd episode5”, for example. There seem to be six episodes overall.
Enjoy!