In the soundtrack, it was revealed in "Langtree's Lament" that Jimmy Brown (Thomas Lennon) has only been gone for three days. However, Miss Langtree (Janet Klein) says that it feels like eight.
Look, it's full of black turtles! We're turtle rich!
Greg: Y'know, it's kinda funny finding a basket of turtles in an abandoned house, huh?
Wirt: Ha ha, yeah. Ha ha ha ha ha ha ha ha...!
Wirt: Greg, not that kind of funny.
The name of Greg's frog listed during the end credits changes each episode based on the running gag that Greg keeps renaming it.