The finale of season 2 for Stargirl saw Courtney Whitmore and the rest of the new and old JSA (Justice Society of America) members go up against an evil-being called Eclipso.

During the credits, the title card cuts to “Stargirl – Frenemies’ and mentions that the show will be ‘coming in 2022’. An end credit also shows ‘The Helix Institute for Youth Rehabilitation’ scenes. Mr. Bones discussing to someone else about holding the Green Lantern’s daughter trying to find her brother that’s being held captive by them.
New casting calls for season 3 brings something different into the mix:
On December 5, 2021, a casting call was advertised on the Project Casting website for Extras that would be in the period time of 1800’s. Thesw are Nurses and Doctors. This may be time travel scenes or could be flashback scenes.
The extras for the 1800’s Doctors, the studio is looking for; males between ages 45 – 70 years old and possibly having mustaches and manicured beards. Ethnicity: Caucasion male.
The extras for the 1800’s Nurses, the studio is looking for any ethnicity, female, ages 35-70 years old. Natural hair colours only and not to have a (modern day look to the hair).
Filming takes place on 17 December 2021 in Georgia, United States.