Barbusca will play Werner, a Young Republican assigned as an aide on the congressional staff of Blair (Andrew Rannells). Werner is more ambitious and less sycophantic than he initially seems.
Newcomer Wells will play Nomi, a self-possessed young talent with the voice to prove it, who quickly becomes the crown jewel in the new business venture of Mo (Don Cheadle).
Black Monday, which also stars Regina Hall and Paul Scheer, follows a motley crew of underdogs causing the worst stock market crash in the history of Wall Street. The series, which was renewed for season 3 in October, is created by David Caspe and Jordan Cahan, who serve as executive producers and showrunners. Black Monday is also executive produced by Seth Rogen and Evan Goldberg.