I have S3 and S4 waiting to be watched - I started watching S3 but it felt a little flat due the absence of the Goddess Lena so I decided to wait until I had them all. This has now dragged on to to S4 and to be honest I didn't have any great enthusiasm to get going.

I was doing some general browsing in IMDb just now and I've discovered guess who returns at the end of S4 - now I'll have to get on with watching them as a matter of urgency. I also suppose I can't just miss out S3 can I?

If you want to get through it quickly I suggest you watch 'The Two', 'Full Disclosure' and 'Facade'. I wouldn't even bother watching the finale. Just read the ep guides for the other eps.