For the first season, John Ridley came up with the idea of Felicity Huffman, who has naturally blue eyes, wearing brown contacts for the part for the added effect of giving her shark eyes. Her character was shut down and became somewhat impenetrable.
The first season of the series takes place in Modesto, California but was filmed mostly in Texas. There are scenes when police vehicles have their lights on without a steady red light present. All police and emergency vehicles in California are required to have at least one steady red light on when the police/emergency lights on the front of police and emergency vehicles are on.