A Visitor from Charleston was Ritter's first play to be professionally mounted; it was performed at the Manitoba Theatre Workshop in 1976.
[2][3] Ritter's most produced play is Automatic Pilot, which focuses on a self-deprecating female stand-up comic and her relationships with men.
[3][5] Two of Ritter's plays, The Passing Scene and Murder at McQueen, have been produced at Toronto's Tarragon Theatre.
Ritter was host of Saturday Stereo Theatre (1983–1984), Dayshift (1985–88), Air Craft (1988–1990) and Ontario Morning (2000–2005).
She has also served as guest host on numerous programs, including As It Happens, The Sunday Edition, The Arts Tonight, Here and Now[7] and Fresh Air, all on CBC Radio One.