In May 2005, Tarantino co-wrote and directed "Grave Danger", the finale of "". For this episode, Tarantino was nominated for the Primetime Emmy Award for Outstanding Directing for a Drama Series at the 57th Primetime Emmy Awards. Tarantino's next film project was "Grindhouse", which he co-directed with Rodriguez. Released in theaters on April 6, 2007, Tarantino's contribution to the "Grindhouse" project was titled "Death Proof". It began as a take on 1970s slasher films, but evolved dramatically as the project unfolded. Box-office sales were low but the film garnered mostly positive reviews.