When does Shimmer and Shine return?

The show is about twin genies, Shimmer and Shine, who grant wishes for their human friend Leah. It premiered on Nickelodeon's Nick Jr. block on August 24, 2015, and ran for four seasons until February 9, 2020. The first season is set in the human world and focuses on a young girl named Leah. In the second season, the characters are transported to Zahramay Falls, a magical land where they live.