In the season premiere, Rob picks up where he left off last time, with an unexplained receipt for the morning after pill. He accuses her of infidelity but she explains that she took it after they last had sex.
If there's a complaint to be made about Catastrophe, it shouldn't be that the drama is interfering with the laughs; it should be what it always and justifiably is -- that the six-episode seasons are too short.
Horgan and Delaney, who also write the show, know that the best you can hope for in marriage is a person who will lie next to you night after night, listen to your fears and make you laugh. Honestly, that really means a lot.
It's the brilliant thing about Catastrophe that, under a pile of knickers and all the filth, it is actually very sweet. Romantic, even. That and the fact that it is hilarious; the filth is top notch, glorious filth.
Their relationship skirts the grey area between endearing and disastrous, but until now there's been more focus on Sharon's emotional landscape, while Rob's arc has concentrated more on the circumstantial.