This episode contains many callbacks to the previous five episodes, ranging from background Easter eggs to the Red Guy outright singing the Creativity Song.
Dream is said or sang 15 times.
Roy (Yellow Guy's dad) appears multiple times throughout the episode, most notably during the Dream Song.
Roy's ending reveal has been foreshadowed ever since episode 2 with his first appearance. In the kickstarter video designed to help the creators fund further projects, Yellow Guy claims they are tied up in his dad's house. In episode 3 Roy can be seen as part of Malcolm's cult. In episode 4, Roy can be seen while Red Guy tries to stop Colin. In episode 5, Roy can be seen lurking above the set when Duck tries to escape. More notably, Roy can be seen in this final entry in the animated Dream Song and in the Karaoke Bar, all leading to the finale.
The Lamp would reappear in episode two of the tv series, but not as an antagonist.