A TV show is any show (to include a drama, a comedy, a documentary etc). TV Show is a more broad term while TV Drama refers to a specific type of show ... a dramatic TV show. Hope this helps.

TV shows are the variety of shows on TV or they are the TV programs that you are watching. TV drama is an specific example of a TV show. A TV drama is a TV show.

P.S. "drama" is a word borrowed from the ancient Greek. The Greeks invented drama, and put on both tragedies ("Oedipus Rex" by Sophocles) and comedies ("The Frogs," by Aristophanes). The word "drama" often refers to the serious business of theatre and acting. A university department that teaches theatre and acting might be called "the drama department." "Drama" sounds formal and serious. The symbol of drama in Western culture is the pair of masks, one smiling and one frowning, representing comedy and tragedy. http://tinyurl.com/zbuntuu In recent years, the word "drama" has acquired an ironic meaning. It means to exaggerate your emotions by acting, in order to manipulate someone. If a teenager says to her parents "If you don't give me XYZ, you don't respect me, my life is over, I'll never speak to you again, you're not my parents, I'm leaving home," the parent might snap back "Oh, please, stop the drama."

A circus is a show. A rock concert is a show. A demonstration of martial arts for an audience could be a show. A Shakespeare play on the stage is a show. Anything that is put on for an audience to watch is a show. The circus, the rock concert, and the martial arts demonstrations are not drama. The Shakespeare play is a drama. A drama tells a story. A drama is fictional (or fictionalized to make a good story). The actors show emotion, and the audience feels emotion. In one sense, the word "drama" includes both tragedies and comedies. In another sense, "drama" suggests strong, serious emotion. A "TV drama" would mean an acted-out story that is serious in tone. On television, a news program is a show, but not a drama. A broadcast of a football game is a show, but not a drama. A TV broadcast of a Shakespeare play would be a drama, but it doesn't need to be anything like Shakespeare. Shows that feature acted-out stories about detectives, or spies, or detectives, or courtrooms, or marriages in trouble would all be dramas. By convention, things are not called "drama" if they have their own special name. A soap opera or telenovela--a continuing story that has an episode every day--is really a kind of drama, but "TV drama" means "a drama on TV that is NOT a 'soap opera' or 'sci-fi' or a 'sitcom.'"

TV drama is a show which has a purpose to create a dramatic tension through real life scenarios which an audience can connect and sypathise with or compare to a situation they or someone they know have been in. There are also situations which don't occur so much in real life but creates a source of entertainment for the audience which they can find funny or interesting.