But they do at least have the teaser summary for these final three episodes, whenever they air - although ep 3X20 is airing on the 17th without a doubt, I would still say.
"THE FIRST CHANG DYNASTY"
05/17/2012 (08:00PM - 08:30PM) (Thursday) : THE STUDY GROUP MOBILIZES TO TAKE BACK GREENDALE – With Chang (Ken Jeong) in control of Greendale, the study group develops an elaborate plan to infiltrate the campus without being detected. While Chang becomes distracted planning a big birthday bash for himself, Jeff (Joel McHale) and the study group launch their sneak attack. Meanwhile, Troy (Donald Glover) enlists the help of the Air Conditioning Repair Annex to help with their break-in plan but knows he may be selling his soul to the devil. Chevy Chase, Gillian Jacobs, Alison Brie, Yvette Nicole Brown, Dany Pudi and Jim Rash also star.
"INTRODUCTION TO FINALITY"
05/17/2012 (09:00PM - 09:30PM) (Thursday) : JEFF GOES UP AGAINST HIS FORMER LAW FIRM COLLEAGUE ALAN CONNOR IN GREENDALE SUMMER FUN COURT – ROB CORDDRY AND JOHN GOODMAN GUEST STAR – When Shirley (Yvette Nicole Brown) and Pierce (Chevy Chase) have a disagreement over their sandwich shop, Jeff (Joel McHale) agrees to argue on Shirley’s behalf but much to his chagrin, Pierce retains Jeff’s former colleague Alan Connor (guest star Rob Corddry, "Hot Tub Time Machine") and the two must square off in "Greendale Summer Fun Court." Meanwhile, Vice Dean Laybourne (guest star John Goodman) makes one last ditch effort to win Troy (Donald Glover) over to his Air Conditioning Repair Annex. Gillian Jacobs, Danny Pudi, Alison Brie, Yvette Nicole Brown and Jim Rash also star.
"DIGITAL ESTATE PLANNING"
05/17/2012 (09:30PM - 10:00PM) (Thursday) : PIERCE AND THE STUDY GROUP PAY A VISIT TO HAWTHORNE ENTERPRISES – GIANCARLO ESPOSITO GUEST STARS – Pierce (Chevy Chase) is summoned to Hawthorne Enterprises to discuss his inheritance with his deceased father’s former right-hand man, Gilbert Lawson (guest star Giancarlo Esposito, "Breaking Bad"). The study group goes with him for moral support and must all pitch in to play the video game of their life on Pierce’s behalf – or risk losing his inheritance. Joel McHale, Gillian Jacobs, Danny Pudi, Alison Brie, Yvette Nicole Brown, Donald Glover and Jim Rash also star.