When does The Adventures of Black Beauty return?

The Adventures of Black Beauty is a British adventure family television series. Two series were produced, the first airing from September 1972 to March 1973 and the second from September 1973 to March 1974. The series was not an adaptation of the 1877 book by Anna Sewell, but a "continuation" featuring new characters created by Ted Willis, most prominently Dr James Gordon, played by William Lucas.