The Flash is an American television series developed by the writing team of Danny Bilson and Paul De Meo that aired on CBS from September 20, 1990 to May 18, 1991. It is based on the DC Comics character Barry Allen / Flash, a costumed superhero crime-fighter with the power to move at superhuman speeds. The Flash starred John Wesley Shipp as Allen, along with Amanda Pays, and Alex Désert.

Multiple references to the series have been made on the 2014 Flash television series, including Shipp portraying multiple characters. Shipp also reprised his role as Barry Allen from this series in the crossovers "Elseworlds" and "Crisis on Infinite Earths", which established The Flash as existing on a parallel Earth to the Arrowverse series called Earth-90, while Pays, Désert, and Mark Hamill reprised their roles as alternate versions of Tina McGee, Julio Mendez and the Trickster in the main Arrowverse.