[1] After publishing a few short comics in Spirou together in which they collaborated on both the writing and art, Yann & Conrad were tasked by the new editor Alain de Kuyssche with adding doodles and jokes in the top margin of the magazine's pages.

This was generally considered a chore by the magazine's contributors, but Yann & Conrad shook things up by spoofing and sometimes outright insulting the series straight below their work.

Les Innommables was originally written by Conrad, who was busy drawing "Jason", and drawn by Yann, but recognising their respective strengths, they eventually switched tasks.

During their period at Spirou, Conrad and Yann both still lived in Marseille and would spend the odd week in Brussels, staying in a guest room in the magazine's building.

In 1990, Conrad returned to Dupuis, the publishing house behind Spirou magazine, which had somewhat modernised since the early 1980s and had launched a new album collection called "Aire Libre" giving authors some editorial freedom.

The existing albums were remade and more episodes produced, turning the series into a more coherent saga with several successive story arcs, set respectively in Hong Kong, Korea and the US.

When Morris and his publisher scrapped the series after two albums, it emerged that Pearce was actually Yann & Conrad sharing both writing and drawing duties as they had done at the beginning of their collaboration.

Yann & Conrad also created a new spin-off series of Les Innommables titled Tigresse Blanche ("White Tiger") and focusing on the character of Alix Yin Fu, a female shaolin fighter and CCP trainee spy.