Spartacus: Blood and Sand

Delicate Things - S1-E6

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.

Victory - S3-E10

Factual error: During the final battle as Saxa starts using the ballista against the Romans in the front, the ballista is portrayed as a weapon launching multiple projectiles at once, while in reality it only launched one at the time.

More mistakes in Spartacus: Blood and Sand

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.

More quotes from Spartacus: Blood and Sand