Who played Sam Winchester in 'Supernatural'?

Who played Seeley Booth in 'Bones'? In which TV series is Seeley Booth a main character? Who played Temperance Brennan in 'Bones'? In which TV series is Temperance Brennan a main character? Who played Dean Winchester in 'Supernatural'? In which TV series is Dean Winchester a main character? Who played Michael Scofield in 'Prison Break'? In which TV series is Michael Scofield a main character?