David Vincent's driver license lists him as 5' 9" tall with brown hair and brown eyes. Moments later, the computer describes him to newly-arrived aliens as 5' 11" tall with sandy hair. Close-ups clearly show Vincent has blue eyes, not brown.
When the DC-3 at the beginning of the episode is in the rainstorm, the close-up of the cockpit shows the rain cascading down the fuselage. At an airspeed of 200 mph or so the rain would be pushed backwards along the fuselage.
When the plane is flying at the beginning of the episode the plane is flying above the rain clouds yet is still in the rain. Since gravity pulls rain out of clouds this is impossible.
Vincent pulls up to the Midlands Academy station wagon. As he gets out of his car, you can see the reflection of a small light turning on and shining off the lower left side of the hood.