There was another ABC TV musical series on ABC (before "Cop Rock") in 1968 with Robert Morse ("How to Succeed in Business") and E.J. Peaker (Minnie in the "Hello, Dolly!" film). It was called, "That's Life" but did not last past one season.
From TV.com:
That's Life was an attempt to blend situation and musical comedy into an hour long weekly format. The show followed the lives of a couple (Robert and Gloria) as they met, got married, bought a house, had a baby, etc. set in the mythical town of Ridgeville. Robert was played by Broadway and film star Robert Morse, and E.J. Peaker was chosen, out of 3000 actresses seen according to ABC, to play Gloria.
Along the way were many guest stars, often in cameo appearances, and lots of song and dance. The music was a combination of new material (by Elliot Lawrence and Martin Charnin) and existing songs, often standards or show tunes. The show was well received, nominated for an Emmy as Outstanding Musical or Variety series in fact, but was not a ratings hit and lasted only one season. Robert Morse remarked later, "I was hurt when it only lasted one season because I liked it and believed in it."
Shelley Berman and Kay Medford appeared occasionally as Gloria's parents. Stan Harris was the program's director, Elliot Lawrence was the musical director and The Tony Mordente Dancers were the resident dance corps. The show was taped in New York City in front of a live audience.
That's Life Episode Guide
"I've lost everything! Luis, Marty, my baby with Chris, Chris himself, James. All I ever wanted was love." --Sheridan Crane "Passions"
-------
"Housework is like bad sex. Every time I do it, I swear I'll never do it again til the next time company comes."--"Lulu"
from "Can't Stop The Music"
-----
"When the right doors didn't open for him, he went through the wrong ones" - "Sweet Bird of Youth"
------------
---------
"Passions" is uncancelled! See NBC.com for more info.