Continuity mistake: During the mall chase, a semi-profile shot shows the squad car roll onto its roof and slide with a large panel of orange signage pinned under the roof. Camera cuts to a view of the officers inside the squad car, and there is no signage nor any other debris pinned under the car's roof. Camera cuts back, and the signage is again pinned under roof. Camera cuts back to frontal view, and the signage is gone again.
Continuity mistake: The woman in the car trying to shoot Jake has a couple of errors. First, she gets six shots out of a four barrel weapon without reloading. Second, she goes from having the weapon out of the window, to no weapon and driving in one second, where it took at least five or six seconds to get it out and aim it.
Continuity mistake: When the Blues Brothers are paying the assessment in the Cook County Assessor's Office, the area behind the assessor has a desk and is not very wide. In the shot where the camera has panned out, it shows a much larger area behind the assessor. Additionally, how did all of the emergency services personnel get in the room without anyone in the shot seeing or hearing them. When it cuts to this scene, the Blues Brothers look surprised, but they should have easily seen and heard this. (02:18:44)
Continuity mistake: Throughout the "Everybody Needs Somebody" song number, pay attention to the band member in the background smoking a pipe. More specifically, watch the smoke coming out of his pipe. Sometimes it's consistent from shot to shot, but at other times, it changes completely. (Ex. When Jake sings "When my soul's on fire," all of the smoke disappears between cuts).
Continuity mistake: When the Blues Brothers first go into the tax building in Chicago, the building has gold numbers above the door that they are blocking from the inside that read 118. When the rest of the cops and a firetruck pass by, we now see the numbers are black and not even the same shape as the gold ones.
Continuity mistake: At Chez Paul, when Jake and Elwood first meet up with Mr. Fabulous, who is talking on the phone, there is a shot of them walking down the hallway towards him and you can see that Mr. Fabulous is looking right at the two brothers. In the next shot, his head is down and he then looks up at Jake and Elwood.