That Nightwing and Flamebird story was the final story for that strip, and it concluded a serial about the Crime Lord of Kandor and the effort to steal the Sun Stone that had run for a few issues. It was also the first Superman Family issue I bought as a kid. I was really bummed that Nightwing and Flamebird never showed up again.

After I learned a lot more about the DC Universe, I thought that that Jur-LL, the Crime Lord of Kandor who was shown in that one story to be an evil counterpart of Jor-El from a parallel universe (he was sentenced to the Phantom Zone from his home dimension for his crimes, but he managed to find a rift to escape into the Krypton-1 dimension, just before Brainiac stole Kandor) should have been established to be the father of the Earth-3 Crime Syndicate's Ultraman. I don't think Ultraman has ever been given a name, has he? He could have been something like Kul-LL.

But Mr. and Mrs. Superman became my favorite Superman Family strip. Cameos by Green Lantern and Harlequin; the wedding of Batman and Catwoman; the first Bronze Age appearances of Ultra-Humanite, the Earth-2 Metallo, the Earth-2 Luthor, and Suzy Tompkins, Lois's niece; a flashback to Krypton-2 when Superman first traveled through time to learn that he was from Krypton. It was great--with beautiful Kurt Schaffenberger art.

One of my other dollar comics favorite features (besides Shazam in World's Finest--loved it, and all of GI Combat) was the Human Target in Detective.