John Schneider plays Jonathan Kent twice after Jonathan's death, in a home video and in Clark's near death experience. He foretells something of Superman's career whereas Lex's mother tells him that he will murder a lot of people.
Martha is capable of accepting Lionel's friendship and making it clear that their dealings will remain on that level. I think and hope that Lionel is genuine. He says, "Good night, Clark" and has to hold back from saying, "Good night, Kal-El."
Lana must be able to cope with anything after what she has been through - like banging your head on the wall because it is good when you stop.