After the hit comedy sereies "Catastrophe" season three finale left viewers with a cliff hanger, here's everything you need to know about the next installment. 

"Catastrophe" will be back on screens in the New Year, promising to brighten up what's typically the most sufferable month of the year, January.

The collaborative effort of Irish comic Sharon Horgan and Irish American funny man Rob Delaney will once again focus on the less-than-picture-perfect side of marital life - and according to reports there will be a specific focus on the reality of sex in long-term relationships.

Read more: Irish screenwriter Sharon Horgan's horror-comedy "Shining Vale" picked up by Showtime

In season four, a major storyline will revolve around the death of Rob's mother, Mia, who was previously played by the inimitable, late actress Carrie Fisher.  (Fisher died suddenly after season three wrapped.)

As for guest stars, Delaney himself confirmed that none other than Chris Noth (aka "Sex and the City's" Mr. Big) will guest star, as will Irish actor Brian Gleeson ("Love/Hate"), Julie Hesmondhalgh ("Broadchurch"), Michaela Watkins ("Casual"), comedian David Alan Grier, and Nat Faxon ("Friends from College").

In a recent interview with ELLE, Irish actor and writer Horgan said that frank conversation around the couple's sex life will underpin a lot of Season 4.

“Is anyone in a long-term relationship actually having sex?” the Meath native said. “I’ve definitely had some friends in couples who really go at it. But generally, long-term relationships seem to form into kind of partnership-friendship things. You don’t want to admit to yourself that you don’t have an active sexual relationship. People keep that under wraps.”

The mother-of-two has been incredibly busy since "Catastrophe" first aired on British TV back in 2015. She recently made her Hollywood debut in "Game Night" alongside Rachel McAdams and Jason Bateman and penned hit US sitcom "Divorce" which stars Sarah Jessica Parker. She also co-wrote the shows "Motherland" and "Women on the Verge", and is set to star herself in "Happy AF."

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Delaney made an appearance alongside Ryan Reynolds in "Deadpool 2" and has been touring as a stand-up comedian. The actor's two-year-old son Henry tragically died of brain cancer in January of this year. 

If you're not caught up on "Catastrophe", the good news is that all episodes can be found on All4 here  or on Amazon Prime.

Read more: ‘Step Brothers’ actor reveals racist remarks made about his Irish heritage

* This article was originally published on our sister website, Irish Tatler.

Rob Delaney and Sharon Horgan in "Catastrophe".Instagram.com/SharonHorgan