"A MILLION THE HARD WAY"
"Banacek. One word.... Like Superman?"
In the Toobworld Dynamic, any mention of Superman without reference to the movies, TV series, or the comic books means that it's a reference to a man who once lived in the same world as the characters who mentioned him in other TV shows.
And even if there is mention of those outside sources, we can easily splain them away - all of the secrets of Superman became known after he died in the early 1960's.
So this is no big deal, but there was a trivial tidbit of interest but which has no bearing on the universe of Earth Prime-Time:
Linda Carsini was played by Margot Kidder. The 'Banacek' episode was broadcast in 1972, six years before she starred in the movie "Superman" as Lois Lane with Christopher Reeve as the Man of Steel.....