In Season 4, things move five years on from when Paul and Ally were on the verge of splitting up. The pair face their biggest parenting challenge as 18-year-old Luke drops a bombshell at Christmas dinner that changes everyone's lives forever. No longer in Luke's shadow, 16-year-old Ava experiences her own bombshell moment as she meets and immediately falls for the charismatic Holly, as Paul and Ally continue to try, fail and try again as they face these latest parenting challenges.

In Season 3, Breeders continues its bitter-sweet look at the struggles of modern parenthood, starting just days after Season 2 ended, as the Worsley family reels from teenaged Luke punching his dad, Paul. Paul's moved out and is staying at his mother-in-law Leah's house. He should be lonely but actually the simpler life has its appeal. Eventually, though, amends with Luke must be made. Meanwhile Ally has her own problems - with work, with her early menopause and with her increasingly strained relationship with her newly adolescent daughter, Ava. Gallows humor and large glasses of wine only go so far in quelling the angst...

Time has moved on in Season 2 of Breeders, the comedy series that explores the parental paradox that you'd happily die for your children, but quite often also want to kill them. Luke is now 13 years old and Ava is 10, serving up brand new parenting challenges for Paul and Ally. Luke's increasing anxiety and Ava's growing independence add some new and uncharted complications into the existing chaotic mix of stretched resources, lack of time and the fine art of winging it while looking like you know what you're doing. Paul's parents, Jackie and Jim are older too, as is Ally's mother Leah, leading Paul and Ally to find that they now have to parent the generation above them as well as the generation below. And at the center of all this is Paul and Ally's relationship. Can they survive the new pressures as they just-about survived the old ones? Or is there a finite number of ropes you can find yourself at the end of?