Who played Dexter Morgan in 'Dexter'?

Who played Frank Reynolds in 'It's Always Sunny in Philadelphia'? In which TV series is Frank Reynolds a main character? Who played Nancy Botwin in 'Weeds'? In which TV series is Nancy Botwin a main character? In which TV series is Liz Lemon a main character? Who played Jack Donaghy in '30 Rock'? Who played Tracy Jordan in '30 Rock'? Who played Tami Taylor in 'Friday Night Lights'?