Azie Tesfai will make her first appearance as Kelly Olsen in the upcoming Supergirl episode "O Brother, Where Art Thou?" However, don't expect that to be the last you see of her, as Tesfai will be a series regular in Season 5.
Prior to becoming a series regular next season, Tesfai will be a recurring actor for the rest of this current season. The upcoming episode will see Kelly Olsen arriving in National City to check in on her brother James after the events of the previous episode left him in the hospital with a life-threatening gunshot wound.
The promotional photos for the coming episode also seem to tease a possible romantic relationship between Kelly and Alex Danvers, which might explain why she'll return and what role she'll play next season. The upcoming episode will also see the debut of Jon Cryer as Lex Luthor.
Airing Sundays at 8 p.m. ET/PT on The CW, Supergirl stars Melissa Benoist as Kara Danvers, David Harewood as Martian Manhunter, Mehcad Brooks as Jimmy Olsen, Chyler Leigh as Alex Danvers, Katie McGrath as Lena Luthor, Jesse Rath as Brainiac-5 and Nicole Maines as Nia Nal.