From the cast in this episode, Clancy Brown (General Zartok) had earlier voiced the fear entity Paralalx in Green Lantern (2011) and Juliet Landau (Drusa) had voiced Labella in Green Lantern: Emerald Knights (2011).
The early drafts of this episode conceived Mogo to be a very spiritual place to visit, with Hal seeing a vision of Carol and Kilowog seeing a vision of his lost family. Unfortunately, they didn't have the budget to give every one a spirit quest like they originally intended, so they only used it on Razer and Saint Walker.