The speed of light (in a vacuum) is 186,282 miles per second.
The speed of sound is (at sea level and room temperature) 344 meters per second. Or, put another way, 768 miles per hour.
That means if one were watching TV at a distance in which it took light one second to reach you (186,282 miles for those of you with bad memories), the sound be behind by 242.5 hours. That's roughly ten days.
Sadly, the quality of most television series would not be diminished by the discrepancy.