This is episode S1.E37 of Bluey - called 'Tit for Tat'. The only listing I can find for this episode is 11 June 1977. I interpret its title correctly it refers to Graham Rouse's character Joe Fulcher (Tat) being exchanged in a kidnap deal with Gerda Nicholson's Monica (i.e. Tit). Anyway the reason I'm interested really is that the exchange takes place at the South Melbourne Gasworks, which are now a park in South Melbourne. 
