Dexter

From the wife of a king to the nanny of a serial killer...

Maria Doyle Kennedy, best known for playing Henry VIII’s first wife, Catherine Aragon, on The Tudors, has landed a role on season five of Dexter.

The Irish actress will help raise Dexter and Rita's kids in the fall, coming on board the Showtime hit as a part-time nanny. Guess Deb and Dexter can't do it by themselves, after all.

Julia Stiles and Shawn Hatosy will also play important roles on season five.