TV has partly focused on teens since "Beverly Hills 90210". A newer trend is teenagers in situations with supernatural menace. The groundbreaker was "Buffy the Vampire Slayer
" which also deals with trying to figure out the nature of good and evil and of deciding who to trust. "Roswell" combined teen romance and UFOs. "Smallville
" is both a great version of the Superman story, and a worthy entry into this new genre of television.