Law & Order: Criminal Intent S05E11 - Slither

Detectives Goren and Eames encounter a gang of high-class, low-lifes led by Bernard, 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.