The episode features the main series regulars and several recurring guest stars who return for the alternate-reality sequences. Role in Episode Leo Howard
This episode marks a significant milestone as Jerry finally earns his black belt. [S4E17] You Dont Know Jack
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. The episode features the main series regulars and
The plot focuses on Jerry Martinez, who is frustrated when Jack Brewer suspends him from taking his black belt test after Jerry throws an unauthorized party at the dojo. Following a blow to the head, Jerry experiences a vision of an alternate universe where Jack never joined the Bobby Wasabi Martial Arts Academy. In this reality: 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.
realizes the positive impact Jack has had on all their lives and, upon "waking up," finally earns his black belt. Cast and Key Characters