There is a brief clip of Cass’ 1973 TV special on this YT video, starts around the 11:40 mark.
Of course! My favorite solo album is Cass Elliot (1972).
Cass Elliot, with her mother, Bessie Cohen, on the left, enjoys a triumphant return to her hometown for Cass Elliot Day in Baltimore. (Baltimore Sun photo by Robert E. Hobby, August 16, 1973)
Her classmates at Forest Park High School knew her as Ellen Naomi Cohen, but the rest of the world knew her as Cass Elliot (or Mama Cass, owing to her days in The Mamas & the Papas, although she no longer appreciated the Mama moniker). And as July passed into August of 1973, with a triumphant return to her hometown of Baltimore less than three weeks away, life was looking pretty good.