At the beginning of the show, as Tod and Buz are driving, the rain is coming down hard. As you see them, from inside the car, approach the police, it is still raining hard with the wipers running. But as they pull off the road to talk to the police, the wipers are not running and it is not raining.
The officer says that one of his men was able to get this infrared photo but what is shown is simply a negative.