Strange Energies

After Starfleet makes first contact with the planet Apergos, the USS Cerritos arrives for "second contact". While power-washing some buildings, Ensign Beckett Mariner—the daughter of Captain Carol Freeman—accidentally activates an ancient defense system that attacks her. It discharges a beam of energy that hits First Officer Jack Ransom and gives him god-like abilities. Ensign D'Vana Tendi becomes concerned that her friend Ensign Sam Rutherford's personality has drastically changed since he lost his memory and gained a new cyborg eye implant. She attempts to fix him with her medical equipment, but scares him off. Tendi decides to implement more extreme measures, but soon realizes how she is treating her friend and makes up with Rutherford. Ransom goes mad with his new power and creates a giant, floating head that goes into space and attacks the Cerritos.

Summary from Wikipedia, CC BY-SA 4.0.