First broadcast: Tuesday 8th January 2019
We rejoin the couple after Rob's secret relapse to alcoholism ended in a dramatic car crash and a forced confession to Sharon. A new acquaintance becomes increasingly friendly with Rob, while Sharon dabbles in a new hobby that could also see her on the wrong side of the law.
First broadcast: Tuesday 15th January 2019
Rob's newly religious sister Sydney visits from the US and a child's accident at school reveals a surprising teacher-pupil rapport to Sharon. Fran invites Sharon to see her son up close in his revealing new play, while Chris introduces his own guest; his new young girlfriend.
First broadcast: Tuesday 22nd January 2019
Sharon and Rob decide to get on a fitness drive. When Sharon visits her less than sympathetic local GP it dawns on her she's not in the peak condition she imagined, but Fran has a helpful suggestion to get her on the right track. Meanwhile Rob endures a fruit-based confrontation at a local park and Dave shows how much he's embracing fatherhood.
First broadcast: Tuesday 12th February 2019
Sharon and Rob arrive in Boston for a family holiday only to receive some tragic news about Rob's mum, Mia. Under pressure, the couple need to negotiate an estranged family member and a 'grief vampire', while Rob has a tempting, but complicated offer from an old friend.
The co-writers and stars of Catastrophe, the Channel 4 comedy about commitment, parenting and staying in love with each other anyway, talk about the show's fourth series.