Nick Jr. Channel Schedule (4/7/2021)

How the Universe Works: "Secrets of the Sun" (8:00 PM)

Space's Deepest Secrets: "Space's Great Wall" (9:00 PM)

Mysteries of the Unknown: "Ghost Writer, Historic Flight and A Creepy Cure" (7:00 PM)

Beyond the Unknown: "Black Widow, Lost Inca City and Genius Syndrome" (9:00 PM)