Aidan Gallagher as Number Five in "The Umbrella Academy."
Christos Kalohoridis/Netflix
- 12 staff members accused "The Umbrella Academy" showrunner Steve Blackman of "toxic" behavior.
- Blackman called the allegations "completely false and outrageous."
- The final season of the Netflix series arrives in August.
A showrunner on "The Umbrella Academy" has been accused by 12 staff members of "toxic" behavior, including bullying and sexism, while working on the cult Netflix show.