Former ER doc Sherry Stringfield is returning to the procedural realm with a meaty guest stint on CSI, sources confirm to TVLine exclusively.

Stringfield will play Dawn, a likable, blue-collar swing shift CSI who joins Morgan (Elisabeth Harnois) in investigating a serial rapist case. When she’s not at work, Dawn is attempting to manage her son’s addiction issues.

PHOTOS | Fall TV Spoiler Spectacular: Exclusive Scoop on CSI Plus 44 Other Returning Favorites

Her episode airs later this fall.