Teenage Mutant Ninja Turtles (TMNT) is a comic book series that was published by Mirage Studios between 1984 and 2014. Conceived by Kevin Eastman and Peter Laird, it was initially intended as a one-shot, but due to its popularity it became an ongoing series. The comic created the Turtles franchise of five television series, seven feature films, numerous video games, and a range of toys and merchandise.

Splinter, often referred to as Master Splinter or Sensei by his students/sons, is a fictional character from Teenage Mutant Ninja Turtles comics and all related media. A mutant rat, he is the grave and stoic sage of the Turtles, their ninjutsu and martial arts instructor, and their adoptive father. The character was originally a parody of the Marvel Comics character Stick.