Oscar Isaac Reveals A Surprising Influence On Moon Knight's Steven Grant

"You know, I saw him as a bit on the spectrum," Isaac told Collider, referring to the Steven half of his character's persona.

To prepare for his Steven scenes, Isaac watched several episodes of the Netflix series "Love on the Spectrum," the dating series that follows people on the autism spectrum. While Isaac enjoyed the show and found it moving, he also found it helpful to get into his character's mindset.

Isaac explained that he sees Steven as someone who's "desperate for connection, but doesn't have the skills to do it." This gives Steven an openness and vulnerability to his personality. In terms of physicality, Isaac played Steven with an "open face." That's a direct contrast with Marc, whom Isaac played as closed off, with lots of defenses up. In addition to "Love on the Spectrum," Isaac also drew on his studies in clowning to portray both characters.

At first, Isaac preferred to film his Steven scenes on different days than his Mark scenes, which required the production to adjust its schedule to accommodate him. As filming went on and Isaac became more comfortable playing the character, he learned how to switch between them on the spot.

On paper, Steven/Marc/Moon Knight is a difficult character for any actor to play. Based on Isaac's comments, it seems like that was the case.