He quit the force after two and a half years of service and, determined to start a career in Hollywood, Alfieri packed his bags and moved to Los Angeles, to the disbelief of his relatives back in Italy.
Alfieri quickly landed work as an actor, with various television spots and two contracts roles on daytime TV Days of Our Lives (1996–1998) and The Bold and the Beautiful (1999–2000, 2004, 2009).
He drew international attention for playing the handsome sensitive gigolo in The Roman Spring of Mrs. Stone (2003) (TV) opposite Helen Mirren and Anne Bancroft.
Prior to that, he starred in the mini-series entitled Elisa di Rivombrosa (2003), a period piece based on the novel Pamela written by Samuel Richardson.
Alfieri was next seen in a supporting role in THINKFilm's', My Sexiest Year (2007), a coming-of-age dramedy set in the 70s starring Frankie Muniz and Harvey Keitel.