Revealing mistake: During the final battle there is a dual between Julius Caesar and Gannicus. At one point Gannicus spins Ceasar around and he is shown to wear modern day underwear.
Spartacus: Blood and Sand (2010)
1 revealing mistake in season 3 - chronological order
Starring: Lucy Lawless, Manu Bennett, Peter Mensah, Daniel Feuerriegel
Other mistake: In the scene where Barca is bleeding at the pool, Batiatus comes and grabs his hair. Barca abruptly moves before Batiatus starts to actually pull his hair.
Spartacus: Gannicus stands the only among us to win his freedom upon the sands.
Laeta: If free, why does he raise arms with the slaves against the republic?
Spartacus: He took up cause to honor a fallen brother - one that taught many of us the ways of battle, and the bond that joins all men and such with it.