Ep. 38: Jaden duels a submarine captain who misunderstands his identity and invites him to teach.
Aired on June 22, 2005Filler

Jaden and Syrus argue before a submarine arrives at Academy Island. The captain demands a duel, leading Jaden to suspect he is a Shadow Rider. The conflict resolves as a misunderstanding; the captain actually seeks to establish an underwater Duel Academy and wants Jaden to teach there. Jaden wins the duel but remains on the submarine. His friends, believing he stayed, return to the island by boat. Syrus regrets their final interaction being a fight. A week later, Jaden returns to explain the events, which cheers Syrus up.
Episodes
- Ep. 34 · Jaden seeks relaxation at the hot springs but enters the spirit world to duel Kaibaman.
- Ep. 35 · Chazz duels Slade with low-attack cards to save Duel Academy from takeover.
- Ep. 36 · Bastion practices dueling while the third Shadow Rider appears and challenges him to a match.
- Ep. 37 · Jaden defeats Tanya who transforms into a white tiger after a tough duel
- Ep. 38 · Jaden duels a submarine captain who misunderstands his identity and invites him to teach.
- Ep. 39 · Chazz faces Dark Scorpion Grave Robbers to recover stolen spirit keys
- Ep. 40 · Jaden faces Abidos, the legendary fifth Shadow Rider, in a duel for spirit keys.
- Ep. 41 · Alexis ventures into the forbidden dorm to find Atticus and faces Titan in the Shadow Realm.
- Ep. 42 · Students celebrate Spirit Day Festival by dressing as Duel Monsters and dueling