"Support System" is the nineteenth episode of the eighth season of Grey's Anatomy and the 167th produced episode of the series. It is also the 260th produced episode of the Grey's Anatomy franchise. It was broadcast on April 12, 2012.
Cristina forces Owen to reveal the intimate details of his affair as their marriage falls apart around them while, after Callie deems her ready for the oral boards, Meredith grows concerned about Cristina's well-being as her personal issues interfere with her studying. Teddy organised a ladies night with Callie, Arizona and a reluctant Bailey. When he steps in as chief, Mark takes his temporary role very seriously and comes into conflict with Richard over a patient.
- "Every little kid knows the words to the song; the foot bones connected to the leg bone, the leg bones connected to the knee bone. In med school you learn it's a little more complicated than that but still, the songs not wrong. Everything is connected. The foot bones connected to the leg bone, the leg bones connected to the knee bone and if you take one piece out, the rest just falls apart."
- "The human body is made up of systems that keep us alive. There's the one that keeps you breathing and the one that keeps you standing, the one that makes you hungry and the one that makes you happy. They're all connected. Take a piece out and everything else falls apart and it's only when our support systems look like they're going to fail us that we realize how much we depended on them all along."
- Main article: Support System/Cast
- "Tonya" - Calahan
- "Winter Ghosts" - JBM
- "Youth" - Daughter
- "All Alright" - Fun.
This episode's title originated the song Support System, originally sung by Liz Phair.