Clement says the Trainwreck director is a comic's comic. "People trust Judd. That's why comedians go to him. He understands that people have different comic ideas. So if you compare things he's directed to other things he's produced, they're quite different. Girls is totally different from This is 40. But he understands them all and he protects the person's idea and that's why people go to him. "

Judd Apatow, Amy Schumer and Bill Hader on set of the film Trainwreck. Credit:Universal

Clement is working with New Zealander director Taika Waititi on the new, untitled series in which each of the two to four episodes ("like mini movies") will have a different story and characters, but the same cast.

"There's one about a dance competition and there's one about time travel. Each one of them is set in different time or has a different subtext. It's like The Twilight Zone, but comedy...there is a theme so far in that all of the ones we've written are about time."

Clement adds Apatow is improving his and Waititi's work. "Usually we know what's wrong with the script but we hand it in anyway and then he'll tell us... if you ever heard anyone talking about working with him, he actually pushes the comedy further. Makes your ideas good. It's good exercise."