The Mercury Theatre on the Air (first known as First Person Singular) is a radio series of live radio dramas created by
Orson Welles. The weekly hour-long show presented classic literary works performed by Welles's celebrated Mercury Theatre repertory company, with music
composed or arranged by Bernard Herrmann. The series began July 11, 1938, as a sustaining program on the CBS Radio network, airing Mondays at 9 pm ET.
On September 11, 1938, the show moved to Sundays at 8 pm. After the front-page headlines generated by "The War of the Worlds" (October 30, 1938) — one
of the most famous broadcasts in the history of radio due to the mass panic it accidentally caused — Campbell Soup signed on as sponsor. The Mercury
Theatre on the Air made its last broadcast December 4, 1938, and The Campbell Playhouse began December 9, 1938.