Goldie wears Bob Mackie, Liza Halston, in Goldie and Liza Together.

Of all the great television mysteries of 1980, the most popular was undoubtedly “Who shot J.R.?” But the most enduring might be “Goldie and Liza Together: Why?” Was there a great public clamoring for this pairing? Did Minnelli and cherished collaborator Fred Ebb, who’d triumphed with the landmark TV concert film Liza with a “Z” eight years earlier, have tax bills to settle? No matter the impetus, here they were, in an hour-long special presentation on CBS directed by Don Mischer and sponsored by Sentry, “a family of insurance companies to meet all your insurance needs!”

Nominated for four Primetime Emmys, including Outstanding Variety or Music Program (which it lost to Baryshnikov on Broadway), its shaky premise is that the stars are old friends finally fulfilling their dream of working together. With Liza supplying the lung power and Goldie the sobriety, we slog through a disjointed first half that includes, most memorably, Hawn performing “Y.M.C.A.” while surrounded by male dancers, a cutesy precursor to the more seductive (and entertaining) “Physical” video Olivia Newton-John released the next year. The number concludes with Hawn joining the boys in the shower, which causes them to flee in a gay panic.