Most likely, Grey's Anatomy will not be affected by anything revealed this Tuesday, May 15 at ABC's fall upfronts. We already know it has been renewed for a fourth season, but not the number of episodes or the timeslot. Most likely, Grey's has been renewed for 22 or 23 episodes and will be staying in its same timeslot of 9PM on Thursdays. However, we'll also find out if ABC picks up Private Practice, the official title of the show (if that isn't it), and the timeslot for that. And we will also find out if the surrounding shows will be the same - Ugly Betty right before and Men in Trees right after. But the most interesting thing we will find out? We'll find out if Grey's will be going up against NBC's hit The Office, as there are rumors flying that the show will be expanding to an hour and if it is, well, then it's probably going to need a new timeslot. Whether or not that will be at 9PM on Thursdays we don't know yet, but we will find that out on Monday, May 14. So stay tuned! We'll bring you all the info from ABC's fall upfronts Tuesday afternoon!