Father, Dear Father

Father, Dear Father was a sitcom about a divorced man with 2 teenage daughters. Patrick Cargill starred. Donald Sinden was a regular and many other familiar faces came and went.
Series 6 and 7, the final 13 episodes, have yet to surface. At the end of its run a movie was made (common practice at that time). The program was revived 5 years later in Australia when "Father" goes to Australia to research a book and ends up caring for his brother's two teenage daughters while their father has a job assignment in London.
http://en.wikipedia.org/wiki/Father,_Dear_Father