Catherine Rollins' life may be at risk, but it will be the Hawaii Five-0 team that must weather a storm of bullets in two new sneak peeks.

The machinations of a Russian spy will lead McGarrett (Alex O'Loughlin) to finally learn the truth behind Cath's (Michelle Borth) departure during this week's "Waiwai." When a USB drive full of classified intel falls into the hands of Anna Novick (Olga Fonda), Hawaii's best and brightest will need to reacquire the dangerous info before any harm can come to their former colleague.

Unfortunately, Anna is armed to the teeth. The spook isn't working alone, and, to add fuel to the fire, it looks like she will pull an innocent civilian into the crossfire.

So, who is the mystery man riding shotgun? Perhaps he was one of Dr. Yang's (Jimmy Borges) unfortunate patients. McGarrett and Danno (Scott Caan) confront the Doc in the second sneak peek, cornering him after they discover that he's hiding foreign objects in his patients.

Does the mystery man have the USB someone in his body? Can McGarrett and Co. keep Cath's identity and mission secure? Find out when Hawaii Five-0 airs Fridays at 9 p.m. ET on CBS.

Tags
Hawaii Five-O, Television, CBS