Chadwick Boseman Faces Killers in First '21 Bridges' Trailer

The 'Black Panther' star plays a detective searching for men who killed eight police officers.

The Russo Bros. have one more trick up their sleeve as their Avengers: Endgame prepares to hit theaters Thursday night.

The filmmakers and STX have unveiled the first trailer for 21 Bridges, which stars Black Panther's Chadwick Boseman and is produced by the Russos. 

Boseman plays a detective whose police officer father was killed in the line of duty decades earlier. When eight police officers are gunned down during a robbery, the detective makes the decision to cut off the isle of Manhattan so that the perpetrators won't be able to escape.

The cast also includes Sienna Miller, Stephan James, Keith David with Taylor Kitsch and J.K. Simmons. 21 Bridges is from director Brian Kirk, who has helmed episodes of HBO's Game of Thrones and Showtime's Penny Dreadful. Mike Larocca, Gigi Pritzker, Boseman and Logan Coles produce alongside the Russos.

Boseman touted the film earlier this month at CinemaCon in Las Vegas, where he recalled shadowing real-life LAPD and NYPD officers for the role. 

"At times it was a lot of fun hanging out with them; at other times it was horrific, some of the things you experience," Boseman said. "One of the things they talked about a lot was how the job affects them personally — how the job takes over their entire lives, and I think that's an element of this film that we try to stay true to."

21 Bridges opens July 12.