Factual error: The memory Jane has of the man who takes away all her memories holds a butterfly needle to Jane's arm. The butterfly needle is called that because it has 2 wings and a body in the middle. To use this needle properly, the person takes both wings up together to be able to slide the small needle in, but the person we see using it, doesn't do this - he holds the needle behind the 2 wings and then inserts it. Also, this needle is far too small to handle the bag of drug-filled fluid that is intended for Jane's arm.
Continuity mistake: When Jane is being told by Mayfair that she can carry a weapon, she has a scar over her left eye. In the next scene, which follows immediately, the scar has gone. (00:50:00)
Continuity mistake: The semi that is hooked up to the the trailer hauling the DEA guns is not the same semi that is hooked up to the trailer when it explodes.
Sent on Tour - S1-E7
Factual error: When they are flying to Michigan, the scene in the air is of mountains that are definitely not between NYC and Michigan.
Scientists Hollow Fortune - S1-E12
Continuity mistake: The team is assaulting the warehouse. The sights on one team member's gun changes 3 times. He starts with a scope, then a quick shot with no/iron sights (and a foregrip has been placed over his rails at the front) and then a reflex sight (a red dot). (00:26:50)
Scientists Hollow Fortune - S1-E12
Continuity mistake: When the FBI team is escaping from the warehouse to save the doctor from the plane it's dark, but when they arrive with the plane it's light.
Older Cutthroat Canyon - S1-E15
Other mistake: In the ship the guy who wanted to kill Jane stops bleeding from his shoulder. And there wasn't any sign of blood on his jumpsuit when he was fighting with Jane either.
Continuity mistake: When Allison gives Kurt his breakfast muffin (in a brown paper bag), it suddenly jumps from his left hand to his right hand between shots.
