Grey's Anatomy - Season 12, Episode 4: Soundtracks

Richard teaches the anatomy of human brain to the interns; Maggie wakes up and realizes she slept with Andrew; Andrew runs into Amelia as he leaves; and Alex picks up Meredith, Maggie & Amelia.  

Maggie tells Meredith she's sore after the sex with Andrew and as they talk Meredith realizes that her sex life died along with with Derek.

In the supply closet, Arizona cries over Abe's death and when April finds her, she tells her about Abe's death; April breaks down over Jackson; Jo accuses Stephanie of lying to Amelia.

Meredith explains to the interns how they should approach close ones to recently deceased patients and break the bad news.

Amelia apologizes to Stephanie for not believing her; Maggie tells Andrew that they're not going to sleep together again, but they end up kissing; Richard helps Mitchel with vivisecting a brain.

Amelia & Meredith set up for their dinner party with the help of Stephanie; Callie arrives with her new girlfriend, Penny; Meredith has a flashback of Derek's doctor the day he died (Penny).