Mark Bonnar doesn't believe 'Catastrophe' will ever return to TV.

Mark Bonnar in character as Commander John Koenig from Space: 1999

Mark Bonnar in character as Commander John Koenig from Space: 1999

The 55-year-old actor played Chris in Sharon Horgan and Rob Delaney's sitcom about two singletons - Irish primary school teacher Sharon and American businessman Rob - who meet in a bar in London and embark on a week-long fling which results in them having a baby and becoming a family.

The Channel 4 show ended after four seasons in 2019 with a poignant moment between the married couple who are seen kissing in the sea after Sharon tells Rob she is pregnant with their third child.

Mark believes the two writers "played a blinder" with that final scene and he doesn't think they will revisit their characters because the ending was so perfect.

When asked if there could be more episodes of 'Catastrophe', he said: "No, I think Sharon and Rob played a blinder when they ended it the way they did in Series 4. I think to leave people wanting more whilst still having given them enough is a classy way to pull something off. When you go before you are asked to leave.

"Also, they’re very busy with other things."

As well as 'Catasrophe', Mark has become a household name thanks to his roles in TV shows like 'Guilt', 'Psychoville', 'Line of Duty' and 'Casualty' among others and he also regularly appears in Big Finish audio adventures.

The Scottish star's most recent voice role was as Commander John Koenig in 'Space: 1999 Dragon's Domain', which is based on Gerry and Sylvia Anderson's 1970s sci-fi TV show of the same name.

Mark was a huge fan of the programme when he was growing up and of Martin Landau's portrayal of Commander Koenig, although he admits there was a specific scene that gave him a recurring nightmare as a child.

Speaking to BANG Showbiz, he shared: "There was one point in the TV show, one of the crew came out of this airlock completely charred, totally burnt to a crisp but he was still moving. Something struck a chord in my eight-year-old brain, so I had lots of silent dreams – you know the dreams where you’re speaking and nobody can hear you, or your screaming and nobody can hear you – with him slowly walking towards me in the living room. It was horrible."

The 'Space: 1999' audio adventures are available exclusively from the Big Finish website (Bigfinish.com).