Recurring Guest Characters Margo 1 guest appearances Huisman 1 guest appearances Boersma 1 guest appearances Mrs. Visser 1 guest appearances Johnny Roos 1 guest appearances Elly Van Roekel 1 guest appearances Keur 1 guest appearances Head of Faculty 1 guest appearances Policeman 1 guest appearances ⇤ « 1 2 » ⇥