Main •
Ethan Tuttle (voiced by Jonny Vance) is Emily's twin brother and Gabby's grandson. In several episodes, it is mentioned that he has
IBS. •
Emily Tuttle (voiced by Alex Hall in half of season 1, Sara Johnson in seasons 1–3) is Ethan's twin sister and Gabby's granddaughter. •
Gabby (voiced by William Lucas) is Ethan and Emily's maternal grandmother. She is a first-generation
Cuban-American. She uses a wheelchair time machine to take herself, her twin grandchildren, and her raccoon Derek to different time periods, and in some cases,
different dimensions. Her full name is Gabriella Villanueva De Los Santos Ron Pablo Jones. •
Derek (voiced by Alex Elkin) is a
raccoon who accompanies Ethan, Emily and Gabby on their time-traveling adventures. In a few episodes, he makes appearances as a superhero named Dark Dumpster Derek. In "Wonky Wages", the Tuttles see a younger version of Gabby find what appears to be a younger version of Derek in
Havana, Cuba in 1940, although Gabby explains that the raccoon she had found back then was "a different Derek". In "Kidnappers & Capitalism", Derek is revealed to be an alien who was supposed to run for president on his original home planet with the help of an intelligence-enhancing substance that he was supposed to drink. •
Roburt (or
Ro-Burt) (voiced by Christopher Pinesworth) is a robot built by the Tuttles that makes his first appearance in "The College Conundrum".
Recurring •
Copernicus (voiced by Blake Brust) is a friend of the Tuttle twins who is characterized as not being the brightest. •
Karinne (voiced by Natalie Madsen) is the series' main antagonist. She regards
Karl Marx as her idol, and her red uniform is a reference to the
flags of communist countries. It is implied in some episodes that she secretly has feelings for Ethan, which she denies. •
Mr. Tuttle (voiced by Corey Landis) is Ethan and Emily's father. •
Mrs. Tuttle (voiced by Rachel Strauss-Muniz) is Ethan and Emily's mother. ==Background and production==