Who played Michael Scofield in 'Prison Break'?

In which TV series is Temperance Brennan a main character? Who played Sam Winchester in 'Supernatural'? Who played Dean Winchester in 'Supernatural'? In which TV series is Dean Winchester a main character? 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'? In which TV series is Dennis Reynolds a main character?