1926 3 Jan. viii. 8/1 (heading) Radio serial makes its bow in Great Britain.
1942 25 July 11/2 (caption) It's just like a radio serial—my daughter's husband deserted her, Father lost his job, and my son here is A.W.O.L.
1992 J. Stern & M. Stern 151/1 He..had already made a local name for himself starring in an antibigotry radio serial called ‘One out of Seven’.