Alan Dale plays General Riesen, Lord of the City of Vega (which was formerly known as Las Vegas). General Riesen played a leading role in the war with the angels, and building Vega as one of the world's few protected cities.
Luke Allen Gale plays William Whele. The son of David, William is the leader for The Church of the Savior, the religion at the heart of Vega. It's centered around the concept of "The Chosen One," a savior of all humanity.