Jane Tennant faces interrogation about her friendship with a CIA mole. Her team investigates an ultrasonic attack on a Marine team, the only victims at a crowded beach. Whistler has a new job that brings her into contact with Lucy again.
When some Marines talking it easy on the beach suddenly collapsed. The team investigates and are told they may have been the victims of an attack using a sonic weapon. Ernie takes them to a place where such weapons are being developed and learn there is such a weapon. They have to figure out who took it. Ernie learns That another marine was also attacked but he was not with the others, concluding That he was the actual target and the others were collateral damage. They learn That a man who worked with the weapon's Development was fired and he has anger issues. They Try to Find him but When they Go to his place he Booby trapped the house. Tennant is being investigated over her relationship with Maggie.—Rcs0411@yahoo.com