Who played Nancy Botwin in 'Weeds'?

Who played Dennis Reynolds in 'It's Always Sunny in Philadelphia'? In which TV series is Dennis Reynolds a main character? Who played Frank Reynolds in 'It's Always Sunny in Philadelphia'? In which TV series is Frank Reynolds a main character? In which TV series is Nancy Botwin a main character? Who played Dexter Morgan in 'Dexter'? In which TV series is Liz Lemon a main character? Who played Jack Donaghy in '30 Rock'?