The Vision - S4-E12
Revealing mistake: Two oarsmen (or rowers) in Ragnar's boat, the first in front of us and the second from the back, pretend to have an oar but have none. (00:38:35)
Vikings (2013)
1 revealing mistake in The Vision
Factual error: A crosshead screw is attached to Ivar's frame. (00:11:21)