مايكل سكوفيلد
Most of the changes in the cast have been due to character deaths. Series creator, Paul Scheuring, explains that killing off major characters "makes the audience that much more fearful for our protagonists" and that "it actually does help us in terms of reducing story lines". The two protagonists of the series, Michael Scofield and Lincoln Burrows, are the only characters to have appeared in every episode of the series.