Heard But Not Scene: Name a TV Character That Never Appeared on Camera

[VOX]

121. Vintage entry: Gladys Porter on "December Bride," 1954-59

She was a bit of a prototype for Vera on "Cheers" and Maris on "Frasier."

https://en.wikipedia.org/wiki/December_Bride
"December Bride centered on the adventures of Lily Ruskin, a spry widow played by Spring Byington, who was not, in fact, a "December" (rather old) bride but very much desired to become one if the right man would come along. Aiding Lily in her search for this prospective suitor were her daughter Ruth Henshaw (Frances Rafferty) and son-in-law Matt Henshaw (Dean Miller), and her close friend Hilda Crocker (character-actress Verna Felton). A next-door neighbor, insurance agent Pete Porter (Harry Morgan), was frequently seen. Married miserably himself, according to his constant complaints about his unseen wife Gladys..."

We finally meet Gladys in a spin-off, "Pete and Gladys," 1960-62, played by actress Cara Williams.