: The episode was directed by Wayne Rose and written by Bryan Q. Miller . Other Possible References

In this episode, several major plotlines converge around Clark Kent's developing powers and Oliver Queen's downward spiral:

: Winslow Schott (Toyman) resurfaces to take revenge on Oliver Queen. He disrupts a Queen Industries gala by planting a bomb and demanding that Oliver publicly confess to murdering Lex Luthor.

The designation most prominently refers to the fourth episode of the ninth season of the superhero series Smallville , which originally aired on October 16, 2009. Smallville Season 9, Episode 4: "Echo"

: As part of his ongoing training, Jor-El temporarily grants Clark the ability to hear the thoughts of others . While intended as a lesson in human nature, it leads to comedic and awkward moments, particularly when he inadvertently listens to Lois Lane's internal monologue.