Steven M. Gagnon

After several of Bailey's patients die, she becomes the focus of a CDC investigation; Cristina teases Alex about his feelings for Jo; Owen continues to take care of Ethan while his parents remain in the hospital.

Kirsten doesn't want Ryan permanently, so he buys a bus ticket. Ryan, Seth and Marissa hide in a model home, but Summer finds out and causes trouble with a bully who fights Ryan.

While visiting Mexico with her family, a woman becomes a victim of foul play; when the International Response Team investigates the woman's husband, he flees, making him the prime suspect.

Gibbs and the team must work with ICE and FBI agents when a security breach results in the death of an ICE agent; Tony comes face to face with Michael Rivkin (Merik Tadros).

Carrie reminds Doug of a past incident at their first house when he wants to buy a chainsaw from an infomercial.

While Hetty is at a Senate hearing in Washington, D.C., a murder investigation leads the team to stolen missiles and a dangerous militia group.