The Friends cast is reuniting for a two-hour TV event this month, and not only is it not a new episode, but one friend is going to have to be there for the rest from afar (but no, not from Yemen). On The Graham Norton Show on Friday, Matthew Perry revealed that he'll be participating "remotely" due to a scheduling conflict—he'll be in rehearsals for London play The End of Longing (which he also wrote) when the special is taped on January 24