Well-established Italian producers Mario Gianani and Lorenzo Mieli — who left their Fremantle-owned banners, Wildside and The Apartment, respectively, earlier this year — are returning to the growing TV and film powerhouse with their new scripted outfit.

The duo — who co-founded “The Young Pope” and “My Brilliant Friend” production house Wildside in 2009 before Mieli exited to set up The Apartment, which was behind the recent hit “Priscilla” — are yet to reveal details of their new company. But the pair have now signed a co-production deal with Fremantle that will see them collaborate on several projects.

Among those in production and post-production...