Complex sentence: She performed with John Forsythe in a drama which concerned a U.S.-bound airplane's encounter with Russian fighter planes above Siberia-she had worked with Forsythe in a 1962 episode of "Bachelor Father", playing petulant actress Kim Fontaine.
Split into simpler sentences: She performed with John Forsythe in a drama which concerned a U.S.-bound airplane's encounter with Russian fighter planes above Siberia. She had earlier worked with Forsythe in a 1962 episode of "Bachelor Father", playing petulant actress Kim Fontaine.