Hat tells Superman his lucky numbers are "4, 8, 15, and..." before being cut off. 4, 8, and 15 are the first numbers in the recurring number sequence in LOST: 4, 8, 15, 16, 23 and 42.
In one scene, Lois addresses Clark by the geographic nickname "Smalllville", which was a frequent term of endearment she used on the live-action series Smallville (2001).