Wire in the Blood (2002)

S6E4 Fall the Shadow (2)

Tony gets the green light to help with the investigation, and he perceives the killings as ritualistic, especially after discovering the phrase "Power Not Truth" scrawled in the blood of the murdered doctors. He starts to link these murders to those of the prostitutes and, despite Alex's warnings, decides to put himself in harm's way as bait to lure the killer out.