Comic book movies are famously littered with Easter eggs referencing the original comics, the artists behind them, and past movie adaptations. Kalina Ivanov, the production designer on The Penguin, has revealed the secrets behind the show’s production, including how the team hid dozens of Easter eggs in plain sight. Oswald Cobblepot, a.k.a. The Penguin, made his DC Comics debut way back in 1941. Since then, the character has appeared in various live-action TV shows, and in Tim Burton’s Batman Returns, opposite Michael Keaton’s Batman. With the character’s rich history, Ivanov and the team had decades worth of material to pull from when hiding secret details.