Continuity mistake: When the crooks are climbing over the wall into the police station yard, when they are on the pavement, the ladder dosen't reach the top of the wall. But when seen from inside the police station yard, it reaches above the wall and looks like a different ladder.
Other mistake: Dean Jones and Connie Stevens are riding in a gondola of a skyway ride at a seaside amusement park. The gondola they are in is obviously on a studio soundstage. It is much larger than the gondolas shown in the rear-screen projection. In addition, there are no riders in any of the other gondolas and the gears and cables of the ride make absolutely no sound.