Slither (S05E11)

Detectives Goren (Vincent D'Onofrio) and Eames (Kathryn Erbe) encounter a gang of high-class, low-lifes led by Bernard (guest star Michael York), a slimy European with a taste for aging blondes and fine wine, who befriends, kills and robs tourists. Goren, however, is shocked to discover that the master murderer shares a connection to a deadly nemesis. The detectives try to out-maneuver the effete but effective Bernard – and his posse of adoring women who kill for him – until Goren's language skills help him zero in on a crime spree that spans the globe. (iTunes)