When does Bob and Margaret return?

The series was based on the Academy Award-winning short film Bob's Birthday, featuring the same main characters, which won the Best Animated Short Film Oscar in 1994. In Canada, it was the highest-rated Canadian-made animated series ever. The show revolves around a married English couple named Bob and Margaret Fish.
In the first two seasons, Bob and Margaret live in England, in the South London community of Balham. For the third and fourth seasons, they move to Toronto, Ontario, Canada, allowing the writers to explore the humour of the culture clash. Brian George replaced Andy Hamilton as Bob's voice.