Serra is a long-time left-wing supporter, although he abandoned PCI's successor, the Partito Democratico della Sinistra, in 1991, because of dissent against the party's directions.

In 1987 he also started collaborating for Mondadori's weekly Epoca, but abandoned it in 1990, when the publisher house was acquired by right-winged tycoon Silvio Berlusconi.

In 1989, Tango was replaced by Cuore as L'Unità's satirical supplement, and Serra was appointed by Massimo D'Alema as its director.

On 7 June 1992, Serra began a popular satire column for L'Unità, entitled "Che tempo fa" accompanied by Ellekappa's comics.

In 1994 he abandoned the direction of Cuore and, in 1996, began to collaborate for the newspaper La Repubblica and for the weekly L'Espresso, for which he continues to write as of 2008.