As Derek prepares for his move to DC, Meredith keeps herself busy at the hospital. Meanwhile, Jackson and April deal with difficult news, and Arizona and Amelia discuss how to best approach Dr. Herman.
Seeing his mother and father together for the first time in years, Barney becomes convinced that he can get them back together.
During a murder investigation, the team uncovers a fraudulent charity targeting those looking for missing military personnel. Tony considers adopting a stray cat that followed him home.
Dawn has had enough of her brothers' gross-out antics and finally gets her own room. It's a dream come true until the Quads realise they need each more than they think.
As The Quad's 10th birthday approaches they decide it is time for them to have individual grown-up parties. So they each plan their own party.