The conversation between M'gaan and J'onn is in hungarian,
M'gann: Ver (Vér: Blood), Tu-sa (Tusa: Battle), Gonyoru Haboru ( Gyönyörü háború: Beautiful war).
J'onn: - M'gann, fejezd be! (M'gann, fejezd be! : M'gann, stop it!)
J'onn: - M'gann, fejezd be! (M'gann, fejezd be! : M'gann, stop it!)
The robots seen when Kara is training Mon-El previously appeared in Superhero Fight Club 2.0 (2016).
The title of this episode is a direct quote from the David Bowie song "Heroes".