GOTEBORG, Sweden– Tony Grisoni, the well-known writer of BAFTA-winning “Southcliffe,” is now working on Paolo Sorrentino’s “The Young Pope” and China Mieville’s “The City & The City.” Grisoni talked about what he was up to in Goteborg where he participated in a TV seminar. He’s collaborating with Umberto Contarello, Stefano Rulli and Sorrentino to write the eight...