This show reunites father and son, Kurt Russell and Wyatt Russell, but they don't share scenes together after they played the same character, Lee Shaw, in different years.
Apple TV+ announced in June 2022 that it has added Anna Sawai, Kiersey Clemons, Joe Tippett, Elisa Lasowski, and Ren Watabe to its cast lineup. In addition, Chris Black and Matt Fraction have come onboard as creators. The series will further explore Godzilla as well as his fellow Titans.
Anna Sawai revealed how her own experience with an actual disaster better connected her to Cate's backstory. She was in Japan during the 2011 earthquake, explaining how her own trauma influenced the character. "The whole thing about her being traumatized, I've never had anything to that extent, but I was in Japan when the 2011 Tohoku earthquake hit and whenever I hear a buzzer, I'm always like, 'Oh my God is the same thing going to happen.' So I just related to her on a different level."
Anders Holm's character, Bill, works for Monarch and is seen wearing a Kansas City Monarch's baseball hat.
In this production, Takehiro Hira and Anna Sawai play father and daughter. They are reunited in Shōgun (2024) but their characters are not related and Hira plays a political and military rival to Lord Toranaga who Sawai's character serves.