Sherman Hemsley (Winslow Schott) and Isabel Sanford (Margaret Duffy) starred together in The Jeffersons (1975) for 11 seasons as husband and wife, George and Louise Jefferson.
When Martha gets mad at Clark she uses his full name, Clark Jerome Kent. Jerome is named after Jerry Siegel, one of the two creators of the character Superman. In the comics, his middle name is given as either Jerome or Joseph(after the other Superman creator Joe Shuster).
When the little girl in the park prepares to defend herself from the barrage of snowballs about to be thrown at her by a bunch of bullies, she holds her arms up in the classic Wonder Woman pose that she uses when she's about to deflect bullets with her bracelets. It is later established in the series that Wonder Woman does indeed exist in the "Lois and Clark" universe (only mentioned, never seen). The little girl is obviously a fan and is imitating her hero.
This takes place in December 1994.