This marks the first on-screen appearance of Sue Dearbon who is married to Ralph in the comics.
According to Natalie Dreyfuss, her and Hartley Sawyer's crackling on-screen dynamic was there from the moment she walked in for the chemistry read. "I walked into the chemistry read and I saw Hartley and I was like, 'Well, hi, we're old friends.' So we had this really like easy chemistry because we'd been friends for 10 years," she said. "The biggest thing was just like the comfort level of messing with him. You know, I know him, and I was already just ready to mess with him and the producers were like, 'Yes, we love this,' and he trusts me and it's comfortable. So it was really fun."
The character John Loring is a reference to Jean Loring, who killed Sue Dearbon in the comics.
This is the first episode of the series to not feature Danielle Panabaker. This leaves only two cast members to appear in every episode: Grant Gustin and Candice Patton.
Barry and Iris discuss the latest Catco magazine issue with the cover story "Lex Luthor Wins Man of Tomorrow Award." The award is a reference to one of Superman's nicknames.