Capaldi appeared in episode " Dentist To The Stars " which is the tenth episode of series five. The first series , Ben, a dentist, and Susan, the worst cook in the world, are certainly loving, caring parents; they just have a problem showing it. Ben seems to be confused as to how much time and money his kids demand from him. Susan has to juggle motherhood, a career, and a husband and hasn't enough time to manage everything, including improving her cooking skills. Nick is always working on his next hair-brained scheme to keep him amused.