Who played Jack Donaghy in '30 Rock'?

Who played Nancy Botwin in 'Weeds'? 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 Tracy Jordan in '30 Rock'? Who played Tami Taylor in 'Friday Night Lights'? In which TV series is Tami Taylor a main character? Who played Betty Suarez in 'Ugly Betty'?