In which TV series is Elena Gilbert a main character?

In which TV series is Abed Nadir a main character? Who played Alicia Florrick in 'The Good Wife'? In which TV series is Alicia Florrick a main character? Who played Elena Gilbert in 'The Vampire Diaries'? Who played Damon Salvatore in 'The Vampire Diaries'? In which TV series is Damon Salvatore a main character? Who played Richard Castle in 'Castle'? Who played Rick Grimes in 'The Walking Dead'?