Revealing mistake: When Alesia is hanging off the cliff, the long shots are obvious doubles. Alesia is a 7 year old girl, and the double is an adult, the legs are much much longer. (00:27:30)
Adventures in the Sin Trade (2) - S4-E2
Revealing mistake: When Xena and the other Amazons see the remains of the Amazons Xena killed, look carefully in the wide shot. The skeleton in the foreground {lower right side of the screen) has his middle finger up.
Revealing mistake: When Callisto holds the chakram with one finger, you can see the stick she's holding that makes it look balanced on her finger. (00:16:20)
Continuity mistake: When Gabrielle is stitching Xena's leg, on the shot of Gabrielle, her hand was down on the leg. The shot cuts to Xena and her hand is up in the air pulling on the string. (00:01:10)
Plot hole: Xena is posing as a guard outside of Caesar's office. She knocks out the 2nd guard and throws him on the ground. Moments later, about 10 guards walk by, but no one notices the passed-out guard on the floor. (00:14:40)
Continuity mistake: When Gabrielle is possessed and Eli is trying to cast the demon out, on the close-up of him you see his hand in the air, but then when it cuts to Gabrielle convulsing you see his hand on his knee.
Continuity mistake: When Xena and Gabrielle are talking about how Xena is going to kill Cesar, on the line "please don't follow me" we see Xena touch Gabrielle's shoulder, but when it is just a close-up of Gabrielle, you don't see a hand on her shoulder.
Continuity mistake: Gabby is stabbing the guard and realizes what she's doing, she raises the knife, looks up at it, and drops it. Then there's a wide shot of her being surrounded by other guards and she does this motion again. (00:34:00)
Continuity mistake: When Gabby is looking for cooking utensils while Xena is sitting there playing with the leaf, Gabby's hair is markably different than in the rest of the episode. It appears as if she's wearing a wig, her hair is redder, and much puffier. Most of the time she has her back to the camera, but when she turns around, it's very obvious that she's wearing a wig. This may have been an insert shot done later, as Renee O'Conner did cut her hair for an episode done just a few weeks later. (00:19:30)
In Sickness and In Hell - S4-E4
Continuity mistake: When Gabrielle, Xena, And Joxer come out of the tavern and see Argo for the first time, Gabrielle is on Xena's right, and Joxer is on the left. Then when the camera shows the group again they have switched, and they switch back to the original sides in a third view of the group.
Continuity mistake: When Gabby is kidnapped and taken away, she's left her sari in the temple. But when she's freed at the end, she suddenly has it back.
Continuity mistake: When Milo is doing flips towards Xena during the fight, his scabbard doesn't have a sword in it. It even bends. Then when he stands up to fight, the sword has reappeared. (00:37:05)
Revealing mistake: When one of the Horde Warriors kills one of Xena's men, he slits his throat. You see the slit throat and blood before the Warrior makes the cut. (00:00:20)
Revealing mistake: As Gabrielle is coming up above the water, you can see just below the water line, her tan body suit, when she is supposed to be naked. (00:09:55)
A Good Day - S4-E5
Revealing mistake: Xena cuts the throat of a Roman Warrior during battle, there is a red line on his neck prior to the cut, and the knife makes no mark on his neck. (00:31:45)
Continuity mistake: While fighting, we see Xena from the back, her sword has fallen off her back, and is hanging upside down from her waist. As soon as the shot changes, we see her sword back upright as it should be. (00:04:25)
Visible crew/equipment: At the end, when Gabrielle is telling Xena why she came back, look to the right of Gabrielle's head. You see a car drive by on the hill in the distance. (00:41:25)
Continuity mistake: When Joxer is painting the set, in the far shot he's using side to side brush strokes, and it doesn't look like any paint is on the brush. On a quick close up, he's making hash marks, and there's a lot of paint on the brush. (00:17:50)
Revealing mistake: Xena rides by on her horse, Argo. It is her stunt double, and not Lucy Lawless. (00:10:20)
In Sickness and In Hell - S4-E4
Continuity mistake: Right after Xena turns Joxer's hat around, she is standing there with her arms, crossed. Angle changes, and her arms are to her side, then she crosses her arms again. Happens again several times during this scenes when the shots change, her arms cross and uncross again. (00:02:50)