In the late 1980s, Stephenson was a scriptwriter on BBC Radio 4's drama series "Citizens". Her original plays for BBC Radio include "Lethal Cocktails", 1989; "Darling Peidi", 1993; "The Anatomical Venus", 1994; "Five Kinds of Silence", 1996, which received the Writers Guild Award for Best Original Drama; "Baby Blue", 1998; "Through a Glass, Darkly", 2004; "Life is a Dream", 2004;" Nemesis", 2005; and "The People’s Princess", 2008. She is also the writer of an occasional therapy comedy series on Woman's Hour called "How Does That Make You Feel?", which began in 2010 and reached its 10th season in 2018.