Complex sentence: Still believing the situation is fictional, Jason casually orders the Thermians to fire upon Sarris's spaceship and then insists on returning home but when they teleport him through space to Earth, he finally realizes the events were real.
Split into simpler sentences: Still believing the situation is fictional, Jason casually orders the Thermians to fire upon Sarris's spaceship and then insists on returning home. When they teleport him through space to Earth, Jason realizes the events were real.