Frank Feys. Actor: The Staircase. Frank Feys is a Belgian international actor. He was trained at the Beverly Hills Playhouse, the school founded by the late Milton Katsalis, considered one of the best acting teachers in Los Angeles. Frank has worked in over 40 TV series and feature films both in the US and in Europe. His portrayal of a British serial killer in 'El caso Wanninkhof' and a Russian...