When Clark is talking to Garrett in the hospital, Clark refers to his father as a "Man of Steel" an ode to the title that Clark himself would one day bear as Superman
This is the first episode to feature "Clark time" with the fluid looking "aura", that Clark leaves behind himself, while moving.
Tom Welling has a scar on his chin, which is quite visible in the scene with John Schneider looking up at him from the hospital bed.
In this episode Jonathan refers to a promise that he and Martha made to each other to let Clark go when he was ready. He confronted the artificial intelligence of Jor-El in the Kawatche Caves, insisting that Clark was not ready in "Exile".
Clark uses the following abilities in this episode: super speed, super hearing, accelerated vision and super strength.