Hunter

The Last Kill (1x17)

:

Hunter and McCall trail a hit man who leaves a napkin with a purple circle on it at the scene of each crime. Hunter believes that the killer is the husband of his former girlfriend, a former magazine model. McCall believes Hunter is focusing on the husband of his ex out of jelousy. And Hunter's ex believes her husband is cheating on her, never suspecting the true nature of her spouse's activities.