is the 14th episode of the fourth season of the medical drama Grey's Anatomy , which originally aired on May 8, 2008. Primary Plotlines
: Izzie Stevens discovers that Ava is not actually pregnant and is experiencing a psychological break, but she struggles with maintaining patient confidentiality versus telling Alex. [S4E14] The Becoming
: Meredith Grey and Derek Shepherd admit a military veteran into their clinical trial. They work on synchronizing their virus injections into a tumor during a simulation. is the 14th episode of the fourth season
: Meredith's therapist, Dr. Wyatt, challenges her on her "cowardice" regarding her fear of a relationship with Derek, leading to a tense confrontation. Notable Scenes & Details which originally aired on May 8