[s4e14] The — Becoming

: The episode features a tribute to military members, centered around the veteran patient and his partner. "Grey's Anatomy" The Becoming (TV Episode 2008) - IMDb

: Cristina is forced to confront her lingering feelings for Preston Burke. A significant moment in the episode features her singing during a surgery while dealing with professional and personal blows. [S4E14] The Becoming

: 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. : The episode features a tribute to military

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

: 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.