Ep. 45: Jurgens and Dominic confront Dr. Bear while Renton faces stress over Eureka's transformation
Aired on March 5, 2006

Jurgens and Dominic board the Gekko to confront Dr. Bear. Upon discovering the truth about the Scub Corals, they start to doubt their loyalties. Meanwhile, on Earth, tension rises between Renton and the children concerning Eureka's transformation.
Episodes
- Ep. 41 · Eureka explores the Vodarac shrine while Gekkostate defends against military forces
- Ep. 42 · Renton and Eureka navigate toward the Great Wall while Gekkostate defends the shrine.
- Ep. 43 · Eureka and Renton arrive on Earth while Dewey shares his past with Anemone
- Ep. 44 · Dominic investigates experimental trials in Warsaw while Eureka faces strange changes on Earth
- Ep. 45 · Jurgens and Dominic confront Dr. Bear while Renton faces stress over Eureka's transformation
- Ep. 46 · Dewey finds the Scub Control Cluster as Holland prepares his crew for global military conflict.
- Ep. 47 · Renton reunites with his sister and learns the Coralian's origin within the Scub Control Cluster
- Ep. 48 · Dewey creates a hole in the Scub Coral for Anemone while Dominic attempts to stop her suicide mission.
- Ep. 49 · Dewey destroys Scub Control Cluster causing global debris on Trapar waves