Revealing mistake: "Alan a Dale": Lady Mildred rides side-saddle. But when Gisburne gallops away with her, some shots reveal that the stunt woman riding the fast-moving horse is astride it full straddle. Her skirt is blown back just enough to see a brief glimpse of the stunt rider's real leg on the horse's right, and the fake pair of legs in side-saddle position on its left. For just a moment, the lady appears to have three legs. (00:20:00)
Continuity mistake: "The Time of the Wolf": Robin slays his evil twin and leaves him on the grass near the standing stones. The body then changes positions without anyone touching it. When Robin leaves, its head is pointing to screen-right. But when Marion arrives, Evil Robin has done an about-face: his corpse is now pointing to the left. (01:21:00)
Continuity mistake: Adam Bell - When Martin is in the custody of Robin, they have all sorts of fun and at one point play a game where the boy is blindfolded. In the long shot, you can see Much is there as well, even though he is supposed to be imprisoned in Nottingham.
Factual error: "Robin & the Sorcerer, Part 2": Kirkley's Abbey has a modern-day asphalt road running past it. (00:04:15)
Continuity mistake: "The Greatest Enemy": It's full daylight when Robin sends Marion and Much away and stays atop the crag to hold off the sheriff's men. The sky behind him is blue. But in the next moment, as he starts firing arrows at them, there's a setting sun behind him and the sky is red. In the following scenes, we see full daylight and blue skies again. (00:35:20)
Revealing mistake: "Lord of the Trees": Gisburne and his soldiers gallop into Sherwood, chasing Robin and Little John. In the background, to the right of the path, there's a large and very un-medieval concrete structure visible, jutting up over a grassy mound. (00:26:05)
Continuity mistake: "Alan a Dale": Within just a few minutes of falling into the water, getting soaked and crawling back out, Maid Marion's hair is blow-dried and fluffy once again. (00:08:15)
Continuity mistake: "Robin & the Sorcerer, Part 1": When Robin's men ambush the sheriff's soldiers, two are struck by arrows and fall from their horses. A few shots later, we see them both lying dead on the ground, but the arrows that killed them have disappeared. (00:46:40)
Continuity mistake: "Robin & the Sorcerer, Part 2": There are two arrows already on the target when Robin's splits one of them. When the target is carried back to the review stand, only the two splitting arrows are there (not even a hole in the cloth where the third should be), and those have somehow moved from the upper right sector of the bull's eye to its very center. (00:19:50)
Revealing mistake: "Robin & the Sorcerer, Part 2": To rescue Marion, Robin kills the bad guy by stabbing him with the silver arrow. A few moments later, after much writhing and screaming, Robin pulls the arrow from the corpse. But its tip and shaft are perfectly clean. Not a drop of blood in sight. (00:40:00)
Revealing mistake: "The Greatest Enemy": Nasir stabs a soldier in the back through the wall of a thatched cottage. When he reaches through the wall and retrieves his dagger from the corpse, there's not a trace of blood on the blade. (00:44:50)
Factual error: "Robin & the Sorcerer Part 1": During the archery tournament, several close-ups reveal that the arrows have 20th Century stainless steel tips on them. You can see the machine-tool marks on the shiny metal. (00:15:20)
