Sigma: "Are you sure this is going to work?" Sigma still didn't seem sure this plan would work.

Nikolai: "Obviously it's not going to work if you keep being nervous!" Nikolai responded as he finished putting Sigma's hat on.

Nikolai and Sigma, by order of Fyodor, had to infiltrate the Hunting Dogs headquarters to have more access to information and research for their plans. After getting ready, with all the confidence in the world, they entered the facilities.