[s4e17] You Dont Know Jack -

realizes the positive impact Jack has had on all their lives and, upon "waking up," finally earns his black belt. Cast and Key Characters

This episode marks a significant milestone as Jerry finally earns his black belt.

have turned "evil" and joined the rival Black Dragon dojo after Jack accepted Ty's offer from the series premiere. Sensei Rudy has lost his dojo and the team has disbanded. [S4E17] You Dont Know Jack

"[S4E17] You Don't Know Jack " is the 17th episode of the fourth and final season of the Disney XD series , which originally aired on March 11, 2015. This episode is notable for being a Jerry-centric story that explores an alternate reality of the Seaford gang. Episode Summary

The episode serves as a "What If?" scenario, specifically referencing the events of the pilot episode "Wasabi Warriors". realizes the positive impact Jack has had on

Olivia Holt returned as a guest star for this episode (and several others in Season 4) after having left the main cast to pursue other projects.

The main character who seeks his black belt and experiences the alternate reality. Dylan Riley Snyder Jack's loyal friend who assists at the dojo. Rudy Gillespie Jason Earles The dojo's sensei who struggles in the alternate timeline. Kim Crawford Olivia Holt Sensei Rudy has lost his dojo and the team has disbanded

The vision includes a humorous (and possibly non-canonical) detail that Sensei Ty has 17 toes.