Behdad played as an army officer in the movie Third Day in 2006. In this role, he is falling in love with an Iranian girl who lived in Khoramshahr, where it was in the siege of at that time. He again, for the second time, was nominated for Crystal Simorgh award in 25th Fajr Film Festival. He played his role in this movie that impressive that it drew a lot of attention from everyone of the contemporaneous filmmakers and critics.