Adam Nimoy, son of the late Leonard Nimoy, initially conceived the idea of a Star Trek documentary as a tribute to the original series for its 50th anniversary. After the death of the beloved actor, the concept changed and it became more about Leonard and his relationship with Adam. The film is now called For the Love of Spock, and a new trailer offers a glimpse at Adam’s efforts to honor his father.

As shown in the footage, For the Love of Spock features rare behind-the-scenes footage and photos interspersed with interviews with Adam’s sister Julie, William Shatner, Zachary Quinto, Simon Pegg, Karl Urban, J.J. Abrams, Trekkers, and more. “People ask me what it was like living with Spock, and for the most part during that period he’d come home at night, eat his dinner, memorize his lines, and then just go to sleep,” Adam says.

Watch the trailer below.

I had a chance to catch For the Love of Spock during a screening at the Tribeca Film Festival, which reflected how much Leonard meant to so many people. The audience was filled with Star Trek fans who differed in age but not in passion for the stories. Adam told those in attendance, “[For the Love of Spock is] my gift to the fans to celebrate and process the loss of my dad and Spock.”

The documentary will hit theaters and VOD on September 9, and if you have any love for Leonard and Star Trek in your hearts, you’ll want to check it out. Here’s the official description:

The film’s focus began as a celebration of the fifty-year anniversary of Star Trek: The Original Series, but after Leonard passed away in February 2015, his son, director Adam Nimoy, was ready to tell another story: his personal experience growing up with Leonard and Spock. Adam not only shares details on the creation, evolution, and universal impact of Mr. Spock, but also about the ups and downs of being the son of a TV icon.