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Appearances
Know It All Nina
Main cast, played by Jenna Ortega
- Episode 1x01: Why are Hot Dogs called Hot Dogs? (Jun 20, 2014)
- Episode 1x02: Do Fish Fart? (Jul 14, 2014)
- Episode 1x03: Who Invented the Selfie? (Sep 5, 2014)
- Episode 1x04: Eyebrows Mustaches (Sep 21, 2014)
- Episode 1x05: Can Ghosts Have Ghosts? (Oct 4, 2014)
- Episode 1x06: Who Teaches Teachers? (Dec 2, 2014)
- Episode 1x07: Ariana Grande's next haircut (Dec 9, 2014)
- Episode 1x08: Why Do We Have Valentine's Day? (Feb 11, 2015)
- Episode 1x09: Why Do We Burp? (Feb 17, 2015)
- Episode 1x10: What was the first video on YouTube? (Feb 24, 2015)
- Episode 1x11: What Are Rainbows Made Of? (Mar 3, 2015)