Patrick Cassidy (Henry Small) had a small multi-episode role as Leslie Luckabee on Lois & Clark: The New Adventures of Superman. The character was supposed to be Lex Luthor's son.
The flashback scenes take place in October 1989.
Lineage is "the line of descendants of a particular ancestor". This episode deals with the lineage of Lex Luthor, Clark Kent, and Lana Lang, and touched on that of Chloe Sullivan.
Rachel Dunleavy holds the same picture of Clark that Jor-El will hold in the Season 9 episode Kandor.
The zip code for Smallville is shown as 67524. That is for Chase, Kansas, in Rice County.