|Rise of the Teenage Mutant Ninja Turtles episode|
|Original airdate||June 29, 2019|
|Story by:||Tony Gama-Lobo|
|Written by||Russ Carney & Ron Corcillo|
|Directed by||Sebastian Montes|
|Voice Direction||Rob Paulsen|
|Supervising Director||Alan Wan|
|Storyboard Artist:||Kevin Molina-Ortiz|
"Mystic Library" is the 35th episode (Episode 20A) of Rise of the Teenage Mutant Ninja Turtles. It first aired on June 29th, 2019.
The Turtles plumb the depths of a mysterious hidden library in search of a way to rescue Mayhem.
- Bat Librarian (Gillian Vigman) (debut)
- Donatello (Josh Brener)
- Hush-Bats (debut)
- Leonardo (Ben Schwartz)
- Raphael (Omar Benson Miller)
- April O'Neil (Kat Graham)
- Foot Clan
- Michelangelo (Brandon Mychal Smith)
- Yōkai Kids (Maurice LaMarche and Rob Paulsen) (debut)
- A few Easter eggs relating to the Turtles' Renaissance-era namesakes are briefly seen when Donnie explains the "sum knowledge of entire civilizations".
- The phrase "New toy!" said by a Yōkai kid, and then Mikey, is a reference to Disney Pixar's Toy Story 3 when a Jack-in-the-box says the same phrase whenever a new toy arrives at Sunnyside Daycare.
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