Superman & Lois 3×13 “Doomsday” Season 3 Episode 13 (Season Finale) – SEASON FINALE – All of Smallville comes together to view a meteor shower, Lex Luthor (guest star Michael Cudlitz “The Walking Dead”) makes his move. Gregory Smith directed the episode written by Brent Fletcher & Todd Helbing (313). Original airdate 6/27/2023.