Russian inmate Boyka, now severely hobbled by the knee injury suffered at the end of Undisputed 2. No longer the feared prison fighter he was, he has declined so far that he is now good only for cleaning toilets. But when a new prison fight tournament begins - an international affair, matching the best fighters from prisons around the globe, enticing them with the promise of freedom for the winner - Boyka must reclaim his dignity and fight for his position in the tournament.
Scott Adkins
as Yuri Boyka
Mykel Shannon Jenkins
as Turbo
Mark Ivanir
as Gaga
Hristo Shopov
as Warden Kuss
Marko Zaror
as Raul 'Dolor' Quinones
Michael Baral
as Casino Manager
Ilram Choi
as The Asian Fighter
Robert Costanzo
as Farnatti
Lateef Crowder
as Santiago Silva
Esteban Cueto
as Sykov
Vernon Dobtcheff
as Rezo
Valentin Ganev
as Warden Markov
