So much has changed in the Roman Republic since Spartacus and his gladiator-rebels cut a bloody path through the House of Batiatus at the end of “Spartacus: Blood and Sand.” Your favorite characters have changed as well. Here’s what the actors who play them have to say about the mindset of each of their characters at the beginning of “Spartacus: Vengeance” (9 p.m. Jan. 27, Starz; 3 stars), and also what you can expect from them throughout the season. (Quotes are taken from my interviews with them and conference call with reporters.)
Curt Wagner, RedEye’s Show Patrol
