This episode originally aired on September 10, 2017. As the penultimate episode of the series, it focuses on the internal collapse of the Partnership and the high-stakes interrogation of Dutch Velders and Ephraim Goodweather by the Master's forces. Release Technical Specifications Based on the file naming convention, this release includes:
: Digital versions are available through the Apple TV Store and Amazon Prime Video. The_Strain_4x09_WEBMux_Ita_Eng_Ac3_Earine
: WEBMux (Web-dl stream muxed with additional audio/subtitles). This episode originally aired on September 10, 2017
: Betrayal, the moral cost of survival, and the crumbling facade of the "Partnership" as the human collaborators realize they are expendable. The Master uses Sanjay Desai to attempt to
: After being captured, Dutch and Eph are held in a high-security facility. The Master uses Sanjay Desai to attempt to break them, leading to a psychological battle of wills. Meanwhile, Fet, Quinlan, and Roman prepare for the final confrontation using the nuclear warhead.