Below, you will see a sneak peak from Thursday's two-hour Season 4 finale, "Freedom." Cristina Yang is unusually cheerful - and there's a reason for it. George, meanwhile, is reveling in his role as the Chief's intern, while Izzie stresses about Alex and Rebecca ...

[youtube]http://www.youtube.com/watch?v=xiYApGoM1u4[/youtube]

Looks like a terrific Grey's Anatomy season-ender. Follow the jump for another "Freedom" clip, in which Callie and Mark flirt, Cristina and Izzie argue over the sparkle pager, Bailey thinks they're all weird, and there's also a really... big... trauma ...

[youtube]http://www.youtube.com/watch?v=vQmxICOs2x0[/youtube]

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.