Marco made his debut as television screenwriter by writing two screenplays in 1980 entitled The House and Love for the Center for Experimental Programs, with Piero Galletti, Guido Giusti and Claudio delle Fratte. The following year the four co-authors, still under the guise of unknown actors, create an experimental short film of 30 'called "I Tried to Love," taken from one of their scripts.

In 1983 Marco was a contributing writer for the program 30 YEARS OF OUR LIVES on 1, and also produced and directed some open-air pieces. In 1984, he wrote for the program FORTE FORTISSIMO shot at the Turin studios hosted by Corinne Clery and Barbara D'Urso. It was during that program that a young Piero Chiambretti debuted

In 1985 he moved to the Saturday afternoon children’s line up at Uno where he wrote for the kids music program Saturday Zecchino, where he created the comic character " Folder " for Piero Chiambretti which went on to be loved by children. He continued on with children’s programming until 1987, and realized a total of 180 broadcasts, and even wrote lyrics for the famous puppet Topo Gigio ("Fables of Topo Gigio") and for children’s songs, and for the TV music teacher Zavallone.

In 1987, together with Valeria Moretti Marco wrote the lyrics for A Sparkling Day, a musical comedy that ran 120' staring Nino Manfredi, Don Lurio and Arturo Brachetti.

In 1991 he wrote dialogues for Hello Italy for 2, a touring program with the presidential train from the '30s. Among the hosts were Sydney Rome and Maria Teresa Ruta.

In 1992 he wrote dialogues for the 2 program Scruples hosted by Enza Sampò . In 1993, together with Roberto Ferrante, he wrote for Beauty and its Surroundings a program hosted by Viviana Antonini

In 1995 he wrote for The Afternoon on Two, a 2 daily talk show hosted by Giulia Fossa , which hosted many guests. In that same year he wrote several episodes of the Men hosted by Antonella Boralevi .

In 1996 he wrote on the children’s program Zap Zap for the Tele Montecarlo channel with Ettore Bassi.
In 1997, Marco then went on to write for 3 for their morning talk show formatted program Open Space, directed by Francesca Calligaro, with numerous guest and star appearances. The program's ratings often spiked very high and once during an episode with guest lyricist Mogol, it grabbed a 24% share of viewership for the 10 a.m. slot; a record for 3.