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: Sura and I often spoke of children. A family we were going to have now forever denied me. As I now deny Glaber of his.
Ilithyia: The child is yours.
Spartacus: You lie.
Ilithyia: Would then my tongue make false noise? It yet speaks bitter truth. Monthly blood ceased after you came to me in Batiatus' villa. Lucretia had promised Crixus - a cruel jest. Tis a memory that lingers, is it not? Of that night. Of you inside me.
Spartacus: Yes. As does memory of my hands around your throat.