Photo Flash: CHICAGO FIRE's 'Nazdarovya'

On CHICAGO FIRE's upcoming episode, titled "Nazdarovya," Dawson (Monica Raymund) attempts to help her brother Antonio (guest star Jon Seda) unravel the details of his drugs-and-gang investigation, and goes behind his back in turning to an unlikely source for assistance. Casey (Jesse Spencer) and his mother, Nancy (Kathleen Quinlan) struggle with their new relationship. Meanwhile, as a favor to Lieutenant Whaley (guest star Shane McRae), Severide (Taylor Kinney) visits someone important from his past, while Herrmann (David Eigenberg) and Otis (Yuri Sardarov) learn some hard truths about their "silent partner" in the bar. Lauren German, Charlie Barnett and Eamonn Walker also star. "Nazdarovya" airs February 13 at 10PM on NBC.

Check out a first look below!

Photos by: ElizaBeth Morris/NBC

Taylor Kinney

Eamonn Walker, David Eigenberg, Joe Minoso, Jesse Spencer, Christian Stolte

Randy Flagler, Taylor Kinney

Shane McRae, Eamonn Walker

Monica Raymund

Shane McRae

Taylor Kinney, Lauren German

Lauren German

Jon Seda, Monica Raymund

Taylor Kinney