Why Part One? Because Part Two will be the press release announcing the finale. But, just in case some of you skeptics do not believe Mike Ausiello at TVGuide (and I understand that, despite your best efforts to say I don't), here is the official press release from ABC stating the two-hour finale.

ABC Entertainment announces special two-hour finales of "Grey's Anatomy" and "Lost." The "Grey's Anatomy" finale airs Thursday, May 22 (9:00-11:00 p.m., ET), and the "Lost" finale airs Thursday, May 29 (9:00-11:00 p.m., ET) on the ABC Television Network. This marks an additional hour for each show this season, for a total of 17 hours for "Grey's Anatomy" and 14 hours for "Lost." (*Editor's note: "Lost" will be pre-empted on May 22 due to the "Grey's Anatomy" finale.)

"Grey's Anatomy" returns with original episodes on Thursday, April 24 (9:00-10:00 p.m., ET), and "Lost" returns with originals that night as well, when it moves to its new 10:00 p.m. time slot.