Ep. 74: Sonic and friends discover Cosmo was used as a living spy tool by Dark Oak.
Aired on April 14, 2005

74
Sonic and his companions realize that Cosmo had been exploited by Dark Oak to serve as a living spy tool, transmitting all her observations and conversations directly to him. The group is deeply shocked by this revelation. When Cosmo attempts to depart from the team due to the situation, her friends intervene to stop her. They reassure her and pledge to continue fighting together as a united group, refusing to let her leave despite the betrayal.
Episodes
- Ep. 70 · Sonic and allies save a ship chased by Metarex, revealing pilot Decoe and Eggman's alliance.
- Ep. 71 · Chaotix Cafe Opening and Eggman's Arrival as Metarex Boss
- Ep. 72 · Yellow Zelkova attacks the Blue Typhoon, forcing a crash landing on Thunderbolt.
- Ep. 73 · Shadow infiltrates the Blue Typhoon to assassinate Cosmo while Tails defends her
- Ep. 74 · Sonic and friends discover Cosmo was used as a living spy tool by Dark Oak.
- Ep. 75 · Blue Typhoon travels to Aquarius coordinates to confront the Metarex armada
- Ep. 76 · Chris and allies use the Master Emerald to counter Final Mova while Eggman reveals a secret.
- Ep. 77 · Final Mova transforms into a giant nut entity while Chaos Emeralds empower Super Sonic and Super Shadow.
- Ep. 78 · Chris abandons hope of returning to Earth after receiving a one-way ticket from Eggman