The Goldfish Problem

Oscar Isaac stars as Marc Spector / Moon Knight and Steven Grant, alongside May Calamawy, Karim El-Hakim, F. Murray Abraham, and Ethan Hawke.

The episode received mostly positive reviews from critics, who praised the performances of Isaac and Hawke and its tonal departure from the MCU, but some pointed out its lack of plot developments.

After going to sleep one night, he finds himself waking up in the Austrian Alps, witnessing a cult meeting led by religious zealot Arthur Harrow, who demands a scarab Grant unknowingly had in his possession.

[6] Slater and Diab executive produce alongside Marvel Studios' Kevin Feige, Louis D'Esposito, Victoria Alonso, Brad Winderbaum, and Grant Curtis and star Oscar Isaac.

[10] The episode stars Oscar Isaac as Marc Spector / Moon Knight and Steven Grant, May Calamawy as Layla El-Faouly, Karim El-Hakim and F. Murray Abraham as the on-set performer and voice of Khonshu, respectively, and Ethan Hawke as Arthur Harrow.

[11][12]: 42:24–42:45  Also appearing are Lucy Thackeray as Donna, Saffron Hocking as Dylan, Shaun Scott as Crawley, and Alexander Cobb as J.B.[11][12]: 43:35 The series' main-on-end title sequence was designed by Perception.

[18] Hawke suggested Harrow's introductory scene where he puts glass shards in his sandals because he wanted the character to have his "full-page drawing" that villains get in the comics.

Commentators noted the lack of context to the release, but felt the fish was important enough to the story in the episode or series to warrant them being featured on a poster.

[22][23] A QR code was included in the episode that allowed viewers to access a free digital copy of Moon Knight's debut comic, Werewolf by Night #32.

[28] Analytics company Samba TV, which gathers viewership data from certain smart TVs and content providers , reported that the premiere was watched by an estimated 1.8 million households in the first five days of release.

[30] JustWatch, a guide to streaming content with access to data from more than 20 million users around the world, estimated that Moon Knight was the top series in the U.S. for the week ending April 3.

Fowler compared the episode to one from Marvel Television's series that did not have MCU connections, although he said "it works for now since Steven is in a very odd cerebral prison, as it were".