Criminal Minds (2005)

S17E1 Gold Star

Title: Gold Star Plot: Prentiss stumbles upon a string of vicious murders tied together by a distinct signature. While grappling with the psychological toll of Elias Voit, the BAU reluctantly enlists his help to hunt down the elusive Gold Star killer. Meanwhile, Rossi and Prentiss strategize to outsmart Voit, seeking an advantage in their tense alliance.