The five-disc DVD and four-disc Blu-ray sets contain all 16 episodes from Season Four, plus extended episodes, deleted scenes, bloopers and more exclusive bonus features.
Special Features:
- New Doc on the Block Get to know the newest ladies at Seattle Grace- Dr. Hahn, Dr. Lexie Grey and Nurse Rose. Hear from each actor about their role on the show and from the other cast members on working with them.
- On Set with Patrick & Eric Get some one on one time with Seattle Grace's dreamy team. Behind the scenes moments with Patrick and Eric on location in Seattle and on set. Also hear from fellow cast members as they share stories about the pair.
- Good Medicine: Favorite Scenes The Cast of Grey's tell of their favorite scenes from Season 4.
- Extended Episode - "Forever Young" includes audio commentary by actress Lauren Stamile and executive producer and director Rob Corn.
- Audio Commentary - With actress Chyler Leigh and associate producer Karin Gleason
- Deleted Scenes
- Bloopers
*(Bonus info subject to change)
Source