Off-world: The Blade Runner Wiki
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Film Continuity

Fost was a Tyrell Corporation scientist who worked on the Isobel Selwyn project.


After the collapse of the Tyrell Corporation following Eldon Tyrell's death and the Blackout, Fost remained at the headquarters and, as of 2026, still believed the corporation was operational. After former Blade Runner Aahna "Ash" Ashina was ambushed by a group of squatters, she ran from them to the safety of Fost's lab, where he housed decomposing replicants, still believing they were alive.[1]

Ash convinced him that she was also part of the project and needed its data to transfer to Alexander Selwyn.[1] Fost then assisted Ash in escaping the derelict headquarters.[2]