Mother Courage and Her Children
Starting in 1976, Troegner was part of the theatre company Berliner Ensemble where she played in Brecht plays, e.g. "Mother Courage and Her Children", "The Threepenny Opera", "The Caucasian Chalk Circle". She dubbed minor roles in several Miss Marple TV series, e.g. "A Murder Is Announced", "A Pocket Full of Rye".