She briefly reprised that role for the Hanna-Barbera animated series, Partridge Family 2200 A.D. for two episodes, before being replaced by Sherry Alberoni.

[6] In a 1977 made-for-television movie, Mary Jane Harper Cried Last Night, she portrayed a disturbed young mother with serious psychological problems who begins to take them out on her toddler daughter.

[4][7] Also in 1977, Dey starred opposite William Katt in First Love, directed by Joan Darling[4][8] and appeared in the Barnaby Jones episode "Testament of Power" (1977).

[4] She had a leading role in 1986's Echo Park as a struggling waitress-actress who takes a job as a stripper delivering singing telegrams.

[4] Although the show ran until 1995, Dey was replaced in 1993 by Annie Potts because producers reportedly felt she had "no chemistry" with co-star Jay Thomas.

[12] In 1993, Dey produced and starred in Lies & Lullabies (later released on DVD as Sad Inheritance), where she played a pregnant cocaine addict.

[13] Dey was mentioned in Shirley Jones's memoir as the only cast member who "consistently refused" to take part in Partridge Family reunions.