What exactly do you gain / learn from television, more specifically, sitcoms?
Ignorance, is not an insult if it is clearly there.
Mind Degeneration? Are you some kindergarden teacher, teaching kids not to be "Couch Potatoes"? Please.
Sitcoms: Ideas, jokes, writing, creativity, daily knowledge, life, and vernacular english.
Television:
The history channel: History? The whole channel is based on that. Government. A lot more than you'd learn in an American history class. Quite a bit on war too.
TLC: Probably anything taught in school and more.
Discovery: General biology, botany, astronomy, history, marine biology, forensics, technology and CS.
AP: All biology, excluding plant life
PBS: Education for grade school, languages, CS.
QVC: Technology.
CNN: Science and Scientific discoveries.
FoodTV: The science of cooking, and art.
There are many more on things like CS. Lucky for you, I forgot the channels.