Now that Superman is finally back in theaters, it’s time to revisit his old adventures.

Director Richard Donner’s Superman: The Movie, which premiered in 1978, is a classic piece of cinema that continues to shape the superhero genre today. Most recently, it led the way for writer-director James Gunn to release Superman, a more modern imagining of the Man of Steel’s adventures, with David Corenswet portraying the titular hero.

Here's what the post-credits scenes entail and the writer/director's philosophy behind them.David Corenswet) sitting on the moon with Krypto in his arms, looking down at Earth. There is some meaning behind it.