Lois just has a minor role in this episode, appearing only in the beginning and in the end.
Central City is 500 miles away from Metropolis.
Lois: (about a runway model) Look at that. Tss. The only thing holding that dress up is fake.
Reporter: Lana, are the jewels real?
Lana Lang: Everything is real, boys...
Clark: What's Lana doing with a guy like Luthor?
Lois: You know her?
Clark: We... used to date.
Lois: Get out!
Clark: In Highschool...
Lois: She's certainly come up in the world.
Lois: From Smallville, I mean...
Lana Lang: Hmm. Red, blue, yellow. Primaries, but it works in a superheroish kind of way. Let me guess, Martha sewn it for you.
Lana Lang: By the way, Clark, how are the folks?
Lana Lang: He wanted to be sure I was alright. And warn me about you. He said you are a bad boy...
Lex Luthor: And what did you say?
Lana Lang: I said I liked bad boys...
Mercy: I'm telling you she heard everything. Maybe I should take her for a nice little "ride."
Lex Luthor: NO!
Terrorist: I think it's deer season.
Superman: Sorry, it's only open season on terrorists.
Lana Lang: Where's Mercy?
Mr. Eelan: Sorry, no mercy tonight.
Lana Lang: Clark Kent, I swear, if you say I'm like a sister to you, I'm going back to Lex.
How can boiling lead not burn Superman's cape? As part if his powers, Superman has a one millimeter aura that protects him. Martha had noticed this when he was growing up, which is why she made the uniform skin-tight - his powers would protect it. However that doesn't explain how his cape survived.
Title: My Girl
This title is taken from the homonymous song by The Temptations.
The scene where Superman keeps the train from falling off the tracks seems like an homage to the similar scene from the 1978's movie Superman.