Lois tells Chloe that she is hunting down a real-life Terminator (Corben). Coincidentally, Brian Austin Green, who plays John Corben, also played in Terminator: The Sarah Connor Chronicles as Derek Reese, a member of the future resistance against Terminators, and the uncle of John Connor.
Lois jokingly claims John doesn't have a heart. This is a comical reference to Metallo's comic origins as having to run his robotic body on kryptonite in replace of a heart.
Corben is always called "John", not his villain name: Metallo.
John Corben is a reporter this episode, when in fact in the comics he's former military and test pilot for Lex Luthor in his sciences division.
Lois's pajamas have red, yellow and blue helicopters, the same colors as Superman's costume. There is a memorable scene in Superman: The Movie where Lois falls from a helicopter and Superman saves her.