Question: What does the 1973 ABC-TV sitcom Adam’s Rib have to do with the NBC Mystery Movie series McMillan & Wife? Answer: According to an item published in the Portland Oregonian during the summer of ’73, the stars of Adam’s Rib--Blythe Danner (the mother of actress Gwyneth Paltrow) and Ken Howard--were offered the lead roles in McMillan, “and turned them down within 15 minutes of each other.” Those parts went instead to Rock Hudson and Susan Saint James.
(Left) TV Guide’s September 8, 1973, preview of the sitcom Adam’s Rib
“Adam’s Rib ... may be one of the more palatable situation comedies of the fall season, judging by the pilot,” remarked Oregonian TV critic Francis Murphy. “The plot is taken from the  Spencer Tracy and Katherine Hepburn movie of the same name, featuring a man-and-wife attorney team.”
Palatable to Murphy or not, the fact is the Friday series Adam’s Rib lasted 13 episodes, just four months. McMillan & Wife ran for six years, 39 episodes (plus pilot). Do you think Danner and Howard might later have spent more than 15 minutes regretting their choice of one show over the other?