Eureka Season 5 Episode 4 : Friendly Fire
As the Astraeus crew tries to overcome their Matrix Eureka experience, Fargo struggles with Holly's death and decides to take an experimental therapy patch to accelerate his progress through the five stages of grief. Meanwhile, a lab accident causes Parrish's latest project, the Firefly, to be set loose. The Firefly is a ball of energy designed to seek out fires and absorb them. However, it is also a potential fire hazard. Henry discovers that Parrish lost control of the Firefly due to zeta waves being emitted by the individuals who were connected to Senator Wen's neural network. After the Firefly is safely recaptured, the Astraeus crew finally begin coming to terms with their experiences in the simulated world.