Continuity mistake: Gambit's sleeves turn from black to pink when Bella Donna reveals to him that she double crossed the Thieves Guild. (00:13:25)
Heart of Ice - S1-E3
Continuity mistake: When Mr. Freeze's henchman Johnny gets his legs frozen, an ice "bridge" connects the gap between his feet. A few shots later and the connective ice is gone, making it look like he is wearing boots made of ice. (00:05:45 - 00:07:00)
Visible crew/equipment: During the final battle between Duncan and Luther, you can see a crew member holding a boom microphone pole standing on the stack of hay bales in one of the shots. (00:44:10)
Factual error: When Charles Barkley says "Welcome to the NBA" after dunking on Mark, the ceiling shown above Barkley is way too low to be the ceiling for Haas Pavilion at UC Berkley where the game is being played. It only appears to be about 30 feet high.
Continuity mistake: Frost bumps into Mullett's car and breaks a brake light. Part of the red casing falls to the floor. When Frost walks over to look at the damage and sweep it away with his foot, a light bulb is now on the floor. (00:09:50)