I cant find the thread this was contained in but there was this link.. http://www.ew.com/ew/daily/0,2514,2992,whyfriendsgueststar.html Due to the fact that this is an US magazine, there is a spoiler for 621. So please be careful, do not click on this link if you live outside the US and don't want to be spoiled.
~Act
Warning, there is an unmarked plot spoiler for some European fans, beginning on 13th May. The episode is 518: and as the title itself is a spoiler, it's unfortunate that it was used as the subject heading.
Scroll down carefully, and look out for "TOW Rachel S*****"
There are no spoiler spaces in the thread until my reply.
This message has been backdated to yesterday.
Tennant