TV American Ninja Warrior - Season 12 Episode 6 : Semifinals 2 American Ninja Warrior - Season 12 Episode 6 : Semifinals 2 6.849/10 by 73 users Ninjas face up to 10 brutal obstacles, including the dizzying Corkscrew, the Salmon Ladder, and the Dungeon. Ninjas include Jessie Graff, Najee Richardson, Joe Moravsky, and Meagan Martin. Details Casts Posters Images Title American Ninja Warrior - Season 12 Episode 6 : Semifinals 2 Alternative Titles 美国极限体能王 First Air Date 2009-12-12 Last Air Date 2025-09-01 Number of Episodes 257 Number of Seasons 18 Genres Reality, Networks NBC, G4, Casts Matt Iseman, Akbar Gbaja-Biamila Plot Keywords , Self - Host Matt Iseman Self - Host Akbar Gbaja-Biamila Episodes List American Ninja Warrior Season 12 :Episode 1 Qualifier 1 Qualifier 1 2020-09-07 Follow competitors as they tackle a series of challenging obstacle courses in both city qualifying and city finals rounds across the country. Those... American Ninja Warrior Season 12 :Episode 2 Qualifier 2 Qualifier 2 2020-09-14 Follow competitors as they tackle a series of challenging obstacle courses in both city qualifying and city finals rounds across the country. Those... American Ninja Warrior Season 12 :Episode 3 Qualifier 3 Qualifier 3 2020-09-21 Follow competitors as they tackle a series of challenging obstacle courses in both city qualifying and city finals rounds across the country. Those... American Ninja Warrior Season 12 :Episode 4 Qualifier 4 Qualifier 4 2020-10-05 Follow competitors as they tackle a series of challenging obstacle courses in both city qualifying and city finals rounds across the country. Those... American Ninja Warrior Season 12 :Episode 5 Semifinals 1 Semifinals 1 2020-10-12 Follow competitors as they tackle a series of challenging obstacle courses in both city qualifying and city finals rounds across the country. Those... American Ninja Warrior Season 12 :Episode 6 Semifinals 2 Semifinals 2 2020-10-21 Follow competitors as they tackle a series of challenging obstacle courses in both city qualifying and city finals rounds across the country. Those... American Ninja Warrior Season 12 :Episode 7 Finals 1 Finals 1 2020-10-28 Follow competitors as they tackle a series of challenging obstacle courses in both city qualifying and city finals rounds across the country. Those... American Ninja Warrior Season 12 :Episode 8 Finals 2 Finals 2 2020-11-06 Follow competitors as they tackle a series of challenging obstacle courses in both city qualifying and city finals rounds across the country. Those... American Ninja Warrior Season 12 :Episode 9 Womens Championship Womens Championship 2021-05-09 Follow competitors as they tackle a series of challenging obstacle courses in both city qualifying and city finals rounds across the country. Those...