Including Bernadette Hughson (Jennifer Morton), Graham Corry (Carl Zlinter), Peter Gwynne (Jack Dorman), and Betty Dyson (Jane Dorman).
The Australian Women's Weekly (Wed. 16 Feb. 1972, p.9), notes that Corry 'spent a great deal of time with a Czech friend before shooting began in order to perfect his Czech accent, a difficult and unusual one.'