The Ultimate Fighter S21, E4
Sixteen top mixed martial arts fighters compete for a UFC contract.
Cast:Dana White , Mike Rowe , Herb Dean , Forrest Griffin , Randy Couture , John Christopher Warner , Conor McGregor , Brookliyn Wren , Urijah Faber , Jon Anik , Bobby Maximus , Matt Serra , Julianna Peña , Diego Sanchez , Kenny Florian , Stephan Bonnar , B.J. Penn , Mohammed Usman
