I must say this is a good comedy i've seen series 1-3 and i've ordered series 4, series 5 is on at the moment. You should watch it
Pick-Up Lines (http://www.youtube.com/watch?v=0dwrXInUh0M#ws)
The Big Bang Theory - Episode Preview Clip (http://www.youtube.com/watch?v=oQzdjKrY3ZU#ws)
Big Bang Theory - Best Of Sheldon (http://www.youtube.com/watch?v=_eD8RhPDU5Y#noexternalembed-ws)