8.1
/10
Thelonious is a fictional character portrayed by Frankie Muniz in the TV series The Simpsons.
In the first episode they appeared in, titled Trilogy of Error (season 12), they were 15 years old.
They appear in 1 episodes out of a total of 768 aired so far

Thelonious

by Frankie Muniz

character

Episodes1

  • 8.6
    /10

    Trilogy of Error
    episode S12.E18 april 2001
    Homer's rush to the hospital to re-attach his severed thumb, Lisa's rush to school to win the science fair, and Bart's run-in with an illegal fireworks scheme interconnect from their point of view.