Momentum Pictures plans to “Escape From Pretoria.” It has taken North American distribution rights to the movie, which stars Daniel Radcliffe as a political prisoner attempting to break out from a maximum security South African jail. Gary Hamilton’s Arclight Films did the U.S. deal and is continuing sales efforts at Cannes, with new footage from the film in hand.

Radcliffe appears alongside Australian actor Daniel Webber (“The Dirt”). The pair play freedom fighters Tim Jenkin and Stephen Lee, who were jailed in 1978 for being involved in covert anti-apartheid operations. Ian Hart (“God’s Own Country”), Mark Leonard Winter (“Cleverman”) and Nathan Page (“Underbelly”) also star.

Based on a true story, the film follows Jenkin and Lee – joined by a fellow inmate – as they decide to escape from prison. After months of planning, and in a race against time as the authorities strengthen the prison’s security, they craft...