When Marine Staff Sergeant Travis Cobb's body is found crushed in a junkyard car, NCIS is called to investigate. We learn our Sergeant also participated in illegal street races, in true Fast and Furious style. After visiting a chop shop and questioning his girlfriend's ex, we learn the girlfriend, Kailani, was actually behind the murder to protect her business. Meanwhile, Tennant is concerned about Alex's new girlfriend, and Whistler wants to introduce Lucy to her coworkers.