Hint #1: The TV show associated with the theme song is the theme of the puzzle
Hint #2: "autotrophs" and "Neanderthals" are easter eggs I included because they're in the theme song as well, but alas they are red herrings... focus on the title instead
Hint #3: "character study"... study the clues for (main) characters from the show
Hint #4: the first letters of the answers to the seven clues with characters in them will spell out a relevant phrase... this will play out much easier if you're familiar with the show... if not, then Google is your best friend