Walker played Robbie Gee 's ( Roly ) father , and Mona Hammond , who played Jo 's ( Natalie ) mother .
Other main cast members were Robbie Gee and Jo Martin .
Walker played Robbie Gee 's ( Roly ) father , and Mona Hammond , who played Jo Martin 's ( Natalie ) mother .
Other main cast members were Robbie Gee and Jo Martin .