Molly of Denali S04 E18 No T for Me/Catch My Drift

Tooey's substitute teacher can't pronounce "Teekone" or "Tooey," so she takes to calling him "T" - a nickname he dislikes. With Grandmother Elizabeth's help, Tooey learns the history of his name and how to ask others to call him by it. Then, Molly and Walter are traveling by boat when suddenly, their engine fails. Can they fix the engine and get home?