S1·E23 Badge of Honor

An old boyfriend of Micki's, Tim Ayres, shows up in town, and immediately begins acting suspiciously. Ryan, somewhat jealous, believes that Ayres is working with local counterfeiters. It turns out that Ayres is an undercover cop. Unfortunately, the crook he is tracking killed the wife of Russ Sharko, who has the cursed sheriff's badge of Wyatt Earp, and is using it to kill off criminals vigilante-style. In the end, Ayres and Sharko are both killed and the badge is recovered.