When does Superman & Lois return?

Tyler Hoechlin and Elizabeth Tulloch star as the title characters Clark Kent / Superman, a costumed superhero, and Lois Lane, a journalist for the Daily Planet. Despite featuring the same characters, the series is adjacent to the pre-existing Arrowverse, taking place in a different continuity to shows set within it.
Clark Kent / Superman and Lois Lane return to Smallville with their sons Jonathan and Jordan. They are reacquainted with Lana Lang, her husband Kyle Cushing, and their daughter Sarah. Their idyllic lives are upended when The Stranger enters as well as by the secret experiments of Morgan Edge.