While not originally a season finale, the massive industry problems that came with the COVID-19 pandemic forced the show's crew to hastily reconfigure this episode into being one, with Grant Gustin warning that it may not have the same level of closure as previous finales.
Ralph says, "It's not like Carver is the 'Paragon of Truth,'" referencing Crisis on Infinite Earths crossover. The Paragon of Truth is Earth-96's Superman who was replaced by Lex Luthor when Lex used the Book of Destiny to avoid the apocalypse.
Carver used Nanites from Palmer Tech as countermeasures against Eva.
Some recurring characters through the season return: Esperanza Garcia, Sue Dearbon, Kimiyo Hoshi, Natalie Sharp, and Mirror Singh.
"To Be Continued.." was shown to prepare for the next season. This is the second time on the show that this has happened. The last time was The Last Temptation of Barry Allen, Pt. 1 (2019).