An Unknown Substance

Overview

Vladimir Kara-Murza, a leading Russian opposition figure and Pulitzer Prize–winning journalist, endured two poisonings that nearly killed him and was later handed a 25-year prison term for condemning Russia's invasion of Ukraine. This short documentary centers on his wife, Evgenia Kara-Murza, who, while he remains behind bars, launches an international effort to secure his release and keep his voice from being silenced.