A betrayal intensifies the issues between Cristina and Meredith; Matthew and April make a decision about their relationship; Bailey faces difficulties with Ben's return.
April's visiting sisters get on her nerves; when Matthew and Jackson witness an accident, they must work together; Callie and Arizona work on their relationship.
The final episode of the drama sees Michael and his compatriots make one last bid to bring down the Company.
MacGyver's Aunt Gwen (Jeri Ryan) gets into his head and convinces Mac and Riley to join Codex.
When a man in full clown costume shoots a bakery owner, the CSIs investigate and discover a decision from Flack's past that may put him in jeopardy. (TV-14)
