[s4e17] You Dont Know Jack -

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

"[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 [S4E17] You Dont Know Jack

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

The episode features the main series regulars and several recurring guest stars who return for the alternate-reality sequences. Role in Episode Leo Howard Kim Crawford Olivia Holt "[S4E17] You Don't Know

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

The disciplined sensei who suspends Jerry; "evil" version in the vision. Mateo Arias

Returns as a guest star, appearing as Jack's "evil" partner in the vision. Ian Reed Kesler Guest stars as the leader of the Black Dragon dojo. Falafel Phil Dan Ahdoot Guest stars as the owner of the local eatery. Notable Trivia