Ahead of season 9's premiere this Thursday, September 27 at 9pm, and assuming you didn't watch season 8, or just want to watch all 24 episodes again...
For those with Netflix accounts, you should know that season 8 (last season) became available on Watch Instantly, earlier this month, on September 4. So you can watch it there right now; season 8 was also released on DVD on September 4; no Blu-ray yet however.
But if you don't have a Netflix account, nor do you want to purchase the 6-disc DVD package, and you have broadband internet access, here's some news you can use, from an ABC press release:
"GREY'S ANATOMY" SEASON 8 AVAILABLE ONLINE AT ABC.COM/GREYSANATOMY
In anticipation of the upcoming season premiere of "Grey's Anatomy," ABC.com is hosting all 24 full episodes from last season at ABC.com/GreysAnatomy. Beginning today through October 6, fans can relive all the dramatic moments leading up to the season finale's tragic plane crash that ultimately left audiences saying goodbye to one of their favorite characters.
In the Season 9 premiere, which airs THURSDAY, SEPTEMBER 27 (9:00-10:02 p.m., ET), the doctors of Seattle Grace are faced with the aftermath of the plane crash. As they try to move on with their lives, they must learn to adapt to the changes, cope with their losses and move forward with their relationships and careers.
"Grey's Anatomy" stars Ellen Pompeo as Meredith Grey, Patrick Dempsey as Derek Shepherd, Sandra Oh as Cristina Yang, Justin Chambers as Alex Karev, Chandra Wilson as Miranda Bailey, James Pickens, Jr. as Richard Webber, Sara Ramirez as Callie Torres, Eric Dane as Mark Sloan, Kevin McKidd as Owen Hunt, Jessica Capshaw as Arizona Robbins, Jesse Williams as Jackson Avery and Sarah Drew as April Kepner.
"Grey's Anatomy" is broadcasted in 720 Progressive (720P), ABC's selected HTV format, with 5.1-channel surround sound.
For more information on "Grey's Anatomy" please visit ABC.com.