John Travolta Gets His Serbian Accent On While Hunting Robert De Niro in 'Killing Season' Trailer (Video)

John Travolta hit all the right notes in "Grease," but his accent falls flat in the first trailer for "Killing Season."

Travolta plays a disgruntled Serbian solider who is on the hunt for Robert De Niro's head in the Appalachian mountains. But De Niro, a reclusive American military vet, has a few tricks up his sleeves and turns the tables on his foreign foe.

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Mark Steven Johnson ("Ghost Rider") directs the Millennium Films release hitting theaters on July 12. Milo Ventimiglia also appears in the thriller as De Niro's son.

Here's the trailer, which is loaded with one-on-one action and Travolta's questionable accent: