In which TV series is Dennis Reynolds a main character?

Who played Michael Scofield in 'Prison Break'? In which TV series is Michael Scofield a main character? Who played Charlie Kelly in 'It's Always Sunny in Philadelphia'? Who played Dennis Reynolds in 'It's Always Sunny in Philadelphia'? 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?