Titled “Arbaeen, Truth Lives On”, it will be broadcast at 9 PM (GMT) on Friday.
Mohammad Reza Mohammadi Nejat is the director of the film, which also includes interviews with analysts and international figures.
Press TV is a 24-hour English language news and documentary network affiliated with Islamic Republic of Iran Broadcasting (IRIB).
Arbaeen, which is one of the largest religious gatherings in the world, comes 40 days after Ashura, the martyrdom anniversary of the third Shiite Imam, Imam Hussein (AS).
Each year, a huge crowd of Shiites flock to the Iraqi city of Karbala, where the holy shrine of Imam Hussein (AS) is located, to perform mourning rites.
Arbaeen falls on October 30 this year.