Leonard Nimoy as Paris plays the part of nemesis to Mark Lenard, who played the father of Nimoy's character, Spock, in Star Trek (1966).
The lines of rebel leader Alex Khora are dubbed by voice artist Vic Perrin (best known as the Control Voice on the original "The Outer Limits"). He also dubbed the dialogue for the character of Constantine in last season's show "The Crane".
Jonathan Goldsmith, Father Sebastian, was "The World's Most Interesting Man" (in commercials for Dos Equis beer) for many years.