After Ginny first speaks with Hal on the school bus, we are show a shot of Hal looking out the window at her, the bus pulls off and we notice that the first window behind him is a emergency exit and the next holds a wheelchair lift. When we cut back to an internal shot of the bus, we can see there is no wheelchair lift on the bus.
After the disqualification, the outline of a body microphone pack can be seen through Hal's sport coat (rear waistband).
When Hal first enters the Luis Dry Cleaners in "Trenton," a Baltimore City Police van drives past behind him.