In 1978 she began portraying Edwina "Cookie" Lewis Dane on the soap opera One Life to Live and continued in that role until 1985.
[1] She portrayed a rural veterinarian in the "Peregrine" episode of the science fiction series Starman that aired in November 1986.
[2] As part of the promotion for her soap opera work, Klenck appeared in a two-part filmed television segment discussing and showing the cutting of her long hair to a shorter style.
In 2004 she participated in a discussion with scientists, theorists and professors presented as a documentary in two parts by PBS as The Question of God: Sigmund Freud and C.S.
The New York Times erroneously printed her obituary prominently in its August 26, 1993, issue, confusing her with the late African American actress whose name, Edwina Lewis, matched the name of the character Klenck played on One Life to Live.